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Provides a detailed background to the conservation status and ecological understanding available on Woolly-necked Storks, and showcases the value of replacing assumptions with field data. Underscores some incorrect assumptions regarding the conservation needs of the species, provides an update (with references from the Special Section of the same issue, and additional references), and provides a roadmap for improving the understanding of this species.
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Articlehistory
Received:10November2020,
Publishedonline:24November2020
©2020TheAuthors.SISConservation.Publishedby:IUCNStork,IbisandSpoonbillSpecialistGroup www.storkibisspoonbill.org/sisconservationpublications/
SISConservation,2020,2,33‐41
SPECIALSECTIONEDITORIAL
ISSN2710‐1142(online)
Woolly-necked Stork - a species ignored
K.S.GopiSundar1
1NatureConservationFoundation,1311,“Amritha”12thMain,Vijayanagar1stStage,Mysuru570017,Karnataka,India.
E‐mail:gopi@ncf‐india.org
Introduction
Storks, Ibises and Spoonbills (SIS) are most
diverseinAfricaandAsia,butSISspeciesinthese
two continents are also among the least studied.
The IUCN SIS Specialist Group is determined to
changethissituationworkingwithcolleagues who
are intrigued by these species. This issue of SIS
Conservationtakesanothersmallstep towardsthis
goalofimproving understanding ofpoorlystudied
species.The SpecialSectionfocusesonone of the
least studied waterbird species in the world, the
WoollyneckedStork.InthisEditorialIprovidean
overviewof thespecies’ecology andconservation
status, describe in brief the contributions to the
SpecialSection,andcontrastsomeofthepublished
informationwithinformationavailableonline.This
editorialandthe SpecialSection is biased towards
thepopulation found in southand southeastAsia,
though information fromAfrica is included where
pertinent.I also bias the editorialtofewaspectsof
the species’ ecology, and a full literature review
willbeprovidedelsewhere.
Aprologuetothiseditorialisthatthetaxonomyof
Woollynecked Storks remains unresolved with
authorities either recognising one species with
three subspecies (Gill et al. 2020), or separating
the African and Asian Woollynecks into two
separate species, Ciconia microscelis and C.
episcopusrespectively(delHoyo et al.2019).The
split into two species is based on geographical
separation alone and requires additional genetic
analysestoconfirmtheproposedsplit.Inthisissue
of SIS Conservation, authors were not asked to
followany one taxonomy and the Special Section
reflectsthediversityofcurrentopinions.
BackgroundtotheSpecialSection
In the recent past a few observations on Woolly
neckedStorks(WNS)attractedmyattentiontothis
species. The first was a field visit in November
2015to Haryana state in India to observe a WNS
nestthatacolleaguehaddiscoveredonafigFicus
religiosatreeamidcropfields.Wegotexceedingly
luckyinreachingthenestjustintimetowatchthe
juvenilesfledge.Toourastonishment,sixjuveniles
fledged from the single nest. The juveniles
continued begging on the ground and sported a
prominentwhiteforehead (Figure 1).Such alarge
number of fledgelings from one nest of a single
nesting stork species was unprecedented. This
WNSpairinHaryanahadfledgedtwochicksmore
than the previous record of four chicks in a nest
documented in southernAfrica (Scott 1975) and
India (Vyas and Tomar 2006), and had a larger
clutch size than was known for the species (35
eggs;Hancock et al. 1992). Inaddition, thewhite
foreheadhelpstoidentifynewlyfledgedWNS,and
isanunreportedcolouration.
ThesecondobservationwasthediscoveryofWNS
above 3,500 m in China and Nepal (Han et al.
2011;GhaleandKarmacharya2018).Thistoowas
unprecedented, and the observation in China
(Figure2)alsoconstitutedamajorrangeextension
of WNS. Both observations coming within a few
years of each other were suggestive of a species
expanding its altitudinal and geographic range.
WithseveralSIS speciesstrugglingtosurviveand
33
Sundar,2020 SpecialSectionEditorial:Woolly‐neckedStorkecology
requiring expensive conservation interventions,
news of a species expanding on its own was
significant.
Finally, the third detail that attracted my attention
was the proposal in 2014 to elevate the
conservationstatusoftheAsianWNSfrom“Near
threatened” to “Vulnerable” following the
proposed split of the WNS into two species
(BirdLife International 2014). This proposal was
madeonanonlineforumwhereexpertsfromsouth
and southeast Asia provided their thoughts.
Several experts from south Asia provided field
observations that did not support a change in
status. Published literature from south Asia
supported these observations. Two experts from
southeast Asia made passionate calls to elevate
theconservation status suggestingthat the species
was imperilled by conversion of forests to
agriculture and hunting in southeast Asian
countries. They suggested that these habitat
changes exposed the species to increased hunting
andthat thespecies maynot beable tosurvive in
agriculturalareas. Using theinputs on this forum,
BirdLife International elevated the Asian WNS
from “Least Concern” to “Vulnerable” (BirdLife
International2014).
These three disparate but somewhat connected
aspectsconvergedinmymindtowardsacoupleof
realizations.Thefirstwasthatitwasentirelylikely
that other ornithologists and researchers had field
observationsonWNSthatcouldhelpbuildamore
complete picture of the species’ ecology and
conservation requirements. The second was that
conservationstatusofseveralSISspecies(seealso
Gula2020), and most certainly theWNS, may be
biasedby anecdotalinformation from a small part
ofitsdistributionrange.
SpeciesaccountsandWNSecology
As with all poorly studied species, generalized
accountsbased on anecdotal reporting and ad hoc
fieldobservationsformedthemajorityofliterature
driving understanding of WNS ecology and
conservation requirements. Early accounts of the
species derived from field observations during
surveys of relatively small geographical areas
describeditasusingavarietyofhabitatsincluding
lowlandswamps and ricepaddies up toelevations
of1,400m and 3,000m(Britton 1980; White and
Bruce 1986). In a prominent generalized species
account that considered the species’ full
distributionrange,WNS beganbeing describedas
a solitary forestnesting stork species (Luthin
1987). Subsequent species accounts highlighted
anecdotal information from southeast Asia and
provided early suggestions that deforestation and
hunting were primary threats to the potentially
imperilledWNS. Thesesuggestions wererepeated
in subsequent generalised accounts, including in
the seminal SIS book by Hancock et al. (1992).
Based on their personal observations, the authors
describedtheWNSinIndiaas difficultto observe
due to its habit of sharing the same habitat as the
tiger (Hancock et al. 1992: 8384). The authors
notedtheabilityofWNSto nest in or near human
Figure 1. Six newly
fledged Woolly‐necked
Stork juveniles (right)
in a farmland area of
Haryana, India.
Fledgelings are
soliciting attention
from the adult bird
(left) and sported
distinct white colouring
on the forehead that is
not seen in older birds.
Photograph by K. S.
Gopi Sundar, November
2020.
34
SpecialSectionEditorial:Woolly‐neckedStorkecology Sundar,2020
habitation but did not discuss these observations
furtherbeyond aparentheticalmention.Somelater
species accounts included agricultural areas as
habitats used by WNS, but the source of this
information was not clear (Elliott 1992). These
species accounts continued to state that primary
threatstoWNSwerehabitatlossandhunting.
Other literature with analysed field observations,
primarily from south Asia and southern Africa,
took a different trajectory in describing WNS
status and ecology. Multiyear counts along a
protected riverine reserve showed WNS
populations to be stable in multiple locations
(Sharma and Singh 2018). Higher resolution
observations showed WNS to habitually use
unprotected wetlands situated in agricultural
landscapes (Pande et al. 2007). Analyses also
showed relatively large numbers of WNS to be
resident in humanmodified landscapes using a
varietyofmanmadefeaturessuchasgardens,cell
phone towers, residential back yards, irrigation
canals,villagetrees,cropfieldsandfallowfieldsin
Asia and Africa (Sundar 2006; Choudhary et al.
2013; Vaghela et al. 2015; Greeshma et al. 2018;
Thabethe and Downs 2018). In KwaZulu Natal,
several observations have been made on WNS at
land fills with dozens of storks gathering at sites
where livestock offal was dumped (J. Gula pers.
comm.; Thabethe and Downs 2018). In southeast
Asia, research continued to be focussed largely
inside protected reserves, and cameratrapping
studies confirmed the value of seasonal shallow
waterholesinsideforestpreservesforWNS(Pinet
al.2020).
Bothgeneralizedaccountsand literaturepublished
using primary observations provided similar
informationregarding some aspects of the species’
biology. For example,bothsuggestedthatWNSin
Africa nested singly but often congregated
suggestive of seasonal movements. Both sources
alsodescribedtheWNSinAsiaasbeingasolitary
nestingstorkusuallyfound in smallgroupsof< 4
withlargerflocksbeingrareandseasonal.
Depending on the source of information,
descriptions of the ecology and conservation
requirements of WNS varied in key aspects.The
conservation implications of this variation were
not trivial. Generalized accounts continued to
stress that the species was imperilled by habitat
lossandhuntingespeciallyinAsia.Thiscontinued
repetition alongside the proposed split of WNS
into two species likely biased status assessments.
However, primary literature from south Asia
showed the species using a variety of human
dominated landscapes including agricultural areas
inrelativelylargenumbers.Thiswassimilartothe
habitsof theWNS inAfrica.Thanks inpart toan
absence of ecological work on the species, the
population estimate for theAsian WNS is a "best
guess”at25,000(WetlandsInternational2020).
SpecialSectiononWNS
I started reaching out to colleagues, researchers
andstudentsin2019toconsider delving intotheir
notebookslookingfor unpublishedinformationon
WNS. By early 2020, enough people had
Figure 2. Adult Woolly‐
necked Stork at 3,500
m altitude at Napa
Lake, China.
Photograph by Peng
Jian‐sheng.
35
Sundar,2020 SpecialSectionEditorial:Woolly‐neckedStorkecology
respondedformetobesurethataSpecialSection
on the species could be developed in SIS
Conservation. Luis Santiago Cano was
enthusiastic as ever about the idea and I started
working with potential authors to develop
manuscripts.At the time of finalising Issue 2, we
have completed reviewing, editing, and proofing
nine articles that form the Special Section on
WNS. There are additional manuscripts in
differentstages ofcompletion that could not meet
the deadline for Issue 2 but will hopefully be
includedinsubsequentissues.
Thepapers
The articles for the Special Section are diverse,
including a collection of unpublished field
sightings (Tiwary 2020), a couple of sightings of
nesting in previously unreported locations (Hasan
and Ghimire 2020; Mehta 2020), an analysis of
secondarydataavailableontheonlineportaleBird
(Roshnath and Greeshma 2020), analyses of a
combination of field data and volunteer
observations from various sources (Gula et al.
2020; Mandal et al. 2020), and analyses of
information collected from systematic field
surveys (Katuwal et al. 2020; Kittur and Sundar
2020; Win et al. 2020). Such a combination of
papers with such disparate sources of information
hasitschallengesintermsofhowresultsshouldbe
interpreted and whether findings can be easily
compared. Notwithstanding these relatively minor
challenges, the papers comprise the largest yet
source of ecological information on WNS. This
helps to propel the species from being one of the
least studied storks to one whose habits are much
betterunderstood.
Tiwary (2020) used opportunistic field
observationsmadewhileonotherresearchtobuild
a small and useful understanding of WNS using
agricultural fields and unprotected wetlands in
northern India. Tiwary (2020) also describes a
potentiallynovelforagingbehaviourthatspeaksof
thebehaviouralplasticitythatWNSappearcapable
of. Hasan and Ghimire (2020)describe nesting of
WNS on cell phone towers in Bangladesh – a
country where the species was suspected to be
extinct as a breeding species. This behaviour of
usinghumanmade structuresfor nestingbyWNS
was once thought to be novel but seems to be
widespread suggesting that some constructions
potentially benefit the species. Mehta (2020)
provides observations of failed nests of WNS in
UdaipurcityinIndiawhichsuggestthatWNSmay
be starting to nest in cities. This is exciting news
since WNS have never been observed nesting
inside cities in south Asia. The phenomenon of
WNS using artificial structures close to human
habitation to nest suggests that the species is not
persecuted in these areas while also underscoring
the species’ ability to use unprotected human
dominatedareas.
Secondary data from online portals where
volunteers upload observations can often be of
great use to develop preliminary understanding of
birds such as the poorly studied WNS. Roshnath
and Greeshma (2020) pull together thousands of
observationsfromKeralastatetopiecetogetheran
understandingofWNSecology.Significantly,they
show that frequency of sightings of WNS has
remained stable between 2000 and 2019, that
breeding records are restricted to few areas in the
state, and that numbers of WNS appear to reduce
acrossthe stateduring summer.Similarly,Mandal
et al. (2020) assemble sightings for the north
eastern state of Assam and combine their own
observations to build a picture of the species’
ecology.TheiranalysesshowWNSinAssamtobe
seasonal visitors primarily during the winter,w ith
no confirmed record of breeding. This is unusual
for WNS that shows seasonal movements in
summer in other locations in south Asia. Both
these papers also caution readers about the
challenges that freely available data posed, but
effectively use available information to set up
interesting hypotheses that will require
standardisedfieldstudiestoconfirm.
Gula et al. (2020) similarly used thousands of
recordsofWNSfromacrossAfricaandAsia.They
obtained observations on WNS from various
published and online sources, and were able to
include more recent field records that authors of
papersintheSpecialSectionprovided. Gula etal.
(2020) provide a comprehensive predictive
modelling of WNS distribution across their entire
distribution range. Their results show the storks’
distribution is affected by slightly different
36
SpecialSectionEditorial:Woolly‐neckedStorkecology Sundar,2020
variables in Africa and Asia pointing to varying
environmentalconditionsandpotentiallyalso how
storksinteractwithhumansineachlocation.They
suggest that differences could also be due to
African researchers usually avoiding agricultural
areas where WNS are being increasingly sighted.
Modelling also confirmed that the species is very
widespread in southAsia and Africa, but with a
restricted and declining distribution in southeast
Asia.
While papers relying on secondary information
havedevelopedsubstantialunderstanding of WNS
ecology and conservation requirements, it was
veryexciting to receivemanuscripts that analysed
primaryfielddata.Thethreepaperswithfielddata
are additionally exciting in using systematic
repeatable field methods, covering relatively
substantial swathes of geographical areas, and
undertakingrepeatedvisitstosamplingsitesacross
seasons and years. Katuwal et al. (2020) use a
novel data set from transects laid across lowland
Nepal to show that WNS are perhaps uncommon
onthesefloodplains.KitturandSundar(2020)use
a multiyear multilocation data set to show that
WNS are widely distributed across agricultural
areas in lowland Nepal and northern India. They
also provide preliminary population estimates
suggesting that WNS population size has
previously been severely underestimated. They
also underscore the complexity of monitoring
WNSandtheecologicalplasticitythatthisspecies
appears to display potentially in response to
seasonal landscapelevel changes that different
agricultural landscapes experience. Finally Win et
al.(2020)haveanalysedauniquedataset,perhaps
the first such data from Myanmar, that allows an
assessment of WNS abundance and habitat use
inside and outside protected areas. Using data
collectedsystematicallyfromseverallocationsand
seasonally over multiple years, they showed that
WNSwere moreabundant outsideprotected areas
in Myanmar, and that WNS liberally used
unprotectedwetlandsandagriculturefields.
Emergingmethodologicalconsiderations
Transect based monitoring of WNS has been
carried out in several locations across south and
southeastAsia. Some studies have used transects
of varying lengths placed either systematically
across entire landscapes (e.g. Sundar and Kittur
2012; Katuwal et al. 2020) or in areas having
differentprotectionstatus(Winetal.2020).These
studies visited transects multiple times for a
relatively large number of transect runs providing
a noticeable propensity   to variation in WNS
sightings. Katuwal et al. (2020) used 0.5 km
transectsacrosslowlandNepaland recordedWNS
in 1.4% of 985 transect runs. Sundar and Kittur
(2012) used 1 km transects across the Gangetic
floodplainsofUttarPradeshandrecordedWNSin
12% of 360 transect runs. Win et al. (2020) used
1.5 km transects inside protected areas and 2 km
transects outside protected areas. WNS were seen
in25%of342transectrunsinsideprotectedareas,
andin 61%of 648 transect runs outside protected
areas. Each of these studies were carried out on
landscapesthat variedenormously in land use but
were in areas where human attitudes to wildlife
wasmoretolerantrelativetoplaceslikesoutheast
Asia where hunting appears to be widespread.
Many different factors could explain the variation
in the proportion of transect runs with WNS
sightings. However, it is somewhat compelling to
note that the WNS sightings were the least in the
study with the smallest transects and viceversa.
Intermediate values were obtained in the study
with intermediate transect length. These
preliminary observations suggest that studies
focusing on WNS across relatively large
landscapeswillrequire transects of at least 1.5 km
inlengthtoobtainadequateinformation.
Anadditionalaspectthatthenewpapersbringout
is the widespread and significant use of non
wetland habitats by WNS. Past longterm
monitoring data on WNS were counts of storks
fromwetlandsaspartofthemidwinter waterfowl
census that have been useful to develop
"guesstimates" of population sizes (Wetlands
International 2020). These censuses focus entirely
on wetlands and these counts would therefore be
inadequate to understand population sizes of the
WNS.OtherSISspeciesthathavepreviouslybeen
assessed using wetland surveys but are
inadequately represented in such counts due to
their habit of largely using farmland habitats,
include the Blacknecked Stork Ephippiorhynchus
asiaticus (Sundar 2005), the Painted Stork
37
Sundar,2020 SpecialSectionEditorial:Woolly‐neckedStorkecology
Mycteria leucocephala and the Blackheaded Ibis
Threskiornis melanocephalus (Sundar 2006). A
muchmorecarefulassessmentofthehabitsofSIS
speciesisneeded toidentifywhich speciescanbe
reliablymonitoredusingonlywetlandsurveysand
whichonesrequirewidercoverage.
WNS natural history and information
sources
While some papers in the Special Section were
developedusingeitherfreelyavailabledataonline,
orcombined different sourcesof data, thereis not
yet an evaluation of the reliability of the different
sourcesofinformation. Habitatuseemergedas an
aspect that was relatively easy to document.
Findings from few sites within the WNS
distribution varied significantly from information
in most generalised accounts. I was curious as to
whetherasimilarunderstanding would bereached
ifphotographs availableon the internetwere used
asasourceofdatatomeasurehabitatuseofWNS.
Thanks to volunteers, 2,254 photographs of WNS
in south Asia were curated from the internet
(eBird, Facebook, iNaturalist, Wiki photographs,
individualblogs, and others).Volunteers listedthe
broad habitat categories (agriculture, forests,
wetlands, other) that WNS were using in
photographs. WNS habitat use determined from
these photographs showed considerable variation
in the three southAsian countries for which we
obtainedatleast15photographseach(Figure3A).
In addition, WNS habitat use was similar across
some Indian states but differed in others (Figure
3B).WNS habitat use assessedusing photographs
suggested a low use of agricultural areas and a
high use of wetlands (Figure 3C). This was
contrary to the data obtained by systematic field
workacrosslargelandscapesinsouthAsia(Figure
3C).
This variation likely reflects the habits of
photographers and bird watchers visiting some
areaslikewetlandsmorethantheydoothers.Data
obtained from online photographs may therefore
reflect people’s  biases ratherthan habits of WNS,
similar to the bias in historic observations by
researchers and conservationists. Any freely
available data therefore requires to be used
thoughtfully and will likely not be adequate to
Figure 3. Habitat use by Woolly‐necked Storks assessed using
freely available photographs online at the level of the country in
south Asia (A: only countries that had at least 15 photographs) and
states of India (B: only states that had at least 20 photographs).
Maps were developed by Swati Kittur using information curated by
volunteers listed in the Acknowledgements. Additionally, a
comparison of use of two major habitat types by storks as assessed
using online photographs (C: black bars) and multi‐year field data
(from Kittur and Sundar 2020; C: dark‐grey bars).
38
SpecialSectionEditorial:Woolly‐neckedStorkecology Sundar,2020
developan unbiased understanding of the species'
naturalhistoryandconservationrequirements.
WNSasastudyspecies
Papers in the Special Section and other literature
point to the suitability of WNS as a model study
species, especially to understand how agricultural
areascanberetainedasmultifunctionallandscapes
forboth growing cropsand providing SISspecies
with habitat. Such understanding is critically
important to conserve biodiversity in crowded
countries such as those in south and southeast
Asiawheredevelopingnewreservesforwildlifeis
becominglessandlessfeasible.Newpapersinthis
issue of SIS Conservation and available literature
provide considerable understanding of WNS, but
manyecologicalaspects remainunstudied.Studies
tounderstand its feedinghabits, breeding ecology,
movements, and seasonal use of habitats in
unexplored landscapes. Behaviour of WNS in
different conditions are very poorly documented,
andrecent observationsarebeginningtoshowcase
howthislineofstudymayyieldnovelinsightsinto
bird behaviour and conservation (Ghimire et al.
2020;Ghimire et al. in press). Studies are needed
across Africa to understand if the species uses
areas close to and within human habitation
elsewhere in the continent, and whether different
pressures such as land use change and hunting
regulatewhereandhowmanyWNSlive.
WNS is also a species that can be used to
underscore the importance of using evidence to
build conservation status assessments. WNS has
helped to showcase how generalised species
accounts can either add new information or
accentuate some aspects of existing information
withoutsubstantiation.Thisinturn,whenparroted
by subsequent generalised accounts, can lead to
incomplete and incorrect understanding of the
species’ habits. Incorrect assumptions regarding a
species’ habits can lead to unreliable population
estimates and eventual assignment to an
inappropriate conservation status. This problem
appears to be more widespread for SIS species
thanpreviously known(see alsoGula etal. 2019;
Gula 2020). While all SIS species have been
accorded conservation status, several species like
the WNS lacked even basic studies, leading to
questionable status assessments. Such species that
require basic ecological research need to be
explicitly identified so that resources may be
acquired to develop studies which in turn can
informevidencebasedstatusassessments.
An additional problem that the WNS is helping
highlight is the unequal level of threats that a
single species faces in different parts of its
distributionrange.WhilethesouthAsiapopulation
of WNS appears to be safe outside inviolate
forested reserves, the southeastAsian population,
which constitutes a relatively small proportion of
the species’ distribution range (see Gula et al.
2020), appears to require urgent conservation
intervention (e.g. Mittermeier et al. 2019). The
status assessment of the species will, however, be
biasedbyitspopulationandstatusintherestofthe
distribution range. To address this bias  which is
certainly not unique to WNS  the IUCN status
assessmentprocessneeds to developamechanism
where imperilled populations can be highlighted
even for species that are not endangered or
threatened.
Epilogue
Adiscussion to reassessthe conservation statusof
WNS was recently hosted on a new online forum
(BirdLife International 2020). New information
that was being developed for the Special Section
ofthisissue ofSISConservation wasprovidedon
this forum to help build a more complete
understanding of WNS. Several papers published
in the Special Section were not complete at the
timeof thediscussionandwilladdtothegrowing
information on the species. The new discussions
included observations from Pakistan and Nepal
thatsuggestedthatthe southAsianpopulation was
expanding. Experts, however, underscored the
serious predicament of the WNS in southeast
Asia,asdidarecentpublicationalongtheMekong
river in Cambodia (Mittermeier et al. 2019). One
of the concerned experts on the discussion
suggested that the WNS numbers being reported
across south Asia may be due to roaming
individuals that were being recounted in different
locations. This suggestion seemed bizarre and
experts in southAsia responded on how this was
39
Sundar,2020 SpecialSectionEditorial:Woolly‐neckedStorkecology
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E.G.Shonith.2018.BreedingofWoollyneckedStork
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Katuwal,H.B.,H.S.Baral,H.P.SharmaandR.C.Quan.
2020.AsianWoollynecksareuncommononthe
implausible. To me, it brought home the dire
situation in southeastAsia where experts appear
unableto conceivethatthespeciesmaynumberin
the tens of thousands anywhere. Using the
information provided to the updated discussion,
WNS inAsia is now proposed to be classified as
“Nearthreatened”. This revision is certainly a
more realistic reflection of the species’ state of
being, but the new down listing reduces the
numberof speciesthat conservationists canuse in
southeastAsia to stem the ongoing deterioration
of forests and wetlands. While new work has
added tremendously to knowledge of WNS
ecology, they also help bring out how much
remains unknown. My hope is that the Special
Section attracts additional attention to WNS and
thatwecan together findaway to helpsecurethe
species,speciallythefalteringpopulationinsouth
eastAsia.Atthe veryleast, I hopethatWNS, and
other SIS species, no longer remain ignored.
Acknowledgments
I am grateful to Luis Santiago CanoAlonso for his support
during the development of the Special Section. I am also
grateful to the many authors who responded to my call
readilyto develop manuscripts,and some kindlyinvited me
to coauthor papers with them. In the process, we have
collectively improved understanding of WNS substantially,
and I have personally learnt a lot. The reviewers of
manuscripts submitted to the Special Section were
outstanding for ensuring that authors received timely but
critical and helpful inputs. Many thanks also to the
volunteers who fastidiously curated photographs from the
internet, especially Radhika Chaturvedi, Nandini Pathak,
Vedang Saikhedkar, Rishwa Shekhar, Nawin Tiwary, and
HarshTrivedi.IamalsogratefultoFenqiforreachingoutto
uswiththeexcellent photographs ofWNS taken at 3,500 m
in China. Thanks are also due to Pradeep Sukhwal for
donating the excellent photograph of WNS that we selected
as the cover photo for this issue. Thanks to Luis Santiago
Cano, John Grant, Jonah Gula and Swati Kittur for their
thoughts on this Editorial. I am grateful to the Nature
Conservation Foundation for providing a home to the SIS
SpecialistGroup.
40
SpecialSectionEditorial:Woolly‐neckedStorkecology Sundar,2020
farmlandsoflowlandNepal.SISConservation2:5054.
Kittur,S.andK.S.G.Sundar.2020.Density,flocksizeand
habitatpreferenceofWoollyneckedStorksCiconia
episcopusinsouthAsianagriculturallandscapes.SIS
Conservation2:7179.
Luthin,C.S.1987.Statusofandconservationprioritiesfor
theworld’sstorkspecies.ColonialWaterbirds10:181
202.
Mandal,J.,L.M.AbrahamandR.Bhaduri.2020.Anoteon
thespatialandtemporaldistributionofAsianWoollyneck
inAssam.SISConservation2:6267.
Mehta,K.2020.ObservationsofWoollyneckedStork
nestingattemptsinUdaipurcity,Rajasthan.SIS
Conservation2:6870.
Mittermeier,J.C.,E,M.SandvigandM.Jocque.2019.
Surveysin2018alongtheMekongriver,northernKratie
province,Cambodia,indicateadecadeofdeclinesin
populationsofthreatenedbirdspecies.BirdingASIA832:
8089.
Pande,S.,N.Sant,R.Bhate,A.Ponkshe,P.Pandit,A.
PawasheandC.Joglekar.2007.Recentrecordsof
winteringWhiteCiconiaciconiaandBlackC.nigra
storksandflockingbehaviourofWhiteneckedStorksC.
episcopusinMaharashtraandKarnatakastates,India.
IndianBirds3(1):2832.
Pin,C.,D.Ngoprasert,T.N.E.Gray,T.Savini,R.Crouthers
andG.A.Gale.2020.Utilizationofwaterholesby
globallythreatenedspeciesindeciduousdipterocarp
forestoftheEasternPlainslandscapeofCambodia.Oryx
54:572582.
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41
... Expert advice may have been the most common source for stork status assessments, but for many species, such advice is most commonly given by itinerant or parachuting professionals from developed countries and can be biased to individual locations (e.g., southeast Asia population of the Woolly-necked Storks, as described in Sundar, 2020), or can be biased by incorrect assumptions (e.g., the unsuitability of tropical farmlands and urban areas for all stork species as recorded in several Red List species assessments). The change in designation for Asian Woolly-necked Storks also suggest that the process of status assignments is sometimes hurried, does not fully consider the opinions of all the participating scientists, and that there is some lack of transparency of how the information provided online in discussion forums are used to finalise status assessments (Sundar, 2020). ...
... Expert advice may have been the most common source for stork status assessments, but for many species, such advice is most commonly given by itinerant or parachuting professionals from developed countries and can be biased to individual locations (e.g., southeast Asia population of the Woolly-necked Storks, as described in Sundar, 2020), or can be biased by incorrect assumptions (e.g., the unsuitability of tropical farmlands and urban areas for all stork species as recorded in several Red List species assessments). The change in designation for Asian Woolly-necked Storks also suggest that the process of status assignments is sometimes hurried, does not fully consider the opinions of all the participating scientists, and that there is some lack of transparency of how the information provided online in discussion forums are used to finalise status assessments (Sundar, 2020). We suggest that future Red List assessments of storks take a more careful approach where evidence can outweigh assumptions as the reason for assigning or changing statuses, especially since new work in Asia is showcasing major assumptions regarding threats to be incorrect for a number of species (Katuwal et al., 2022;Koju et al., 2019;Sundar and Kittur, 2013;Win et al., 2020). ...
... It appears possible that assumptions regarding requirements of protected and undisturbed wetlands for the breeding of this species (which may be essential in few countries in south-east Asia where hunting of all animals is rife; Harrison et al., 2016) led to these statements that suggest population declines for the species as a whole. The manner of changing status for the Asian Woolly-necked Stork additionally suggests that both the assignment of confident status and especially changes in these statuses require careful oversight, broader discussion, and greater transparency (Sundar, 2020). Despite the increasing trend in stork research in the last two decades, population data for science-based status assessments do not exist for most tropical species, so the changes in Red List status in the early 2000s clearly indicate that science-based evidence is not driving the assessments of these species. ...
Article
Full-text available
Storks are a conspicuous pan-global freshwater flagship taxon with 20 extant species, all of which have been accorded IUCN Red List status. Red List assessments use a combination of scientific evidence and expert inputs to develop species-level status, but there is little careful evaluation of whether these assessments are comparable across species. Using standard literature databases, we compiled and analysed patterns of research in peer-reviewed literature for all 20 stork species. Our search yielded 989 publications between 1950 and 2022, showing bias in both the coverage of species (66 % covered three stork species) and geographical locations (53.8 % from Europe and the United States of America) despite the highest stork species richness being present in Africa and Asia. Publications on storks, especially from Asia, have increased over time, with 81 % of all studies published since 2000. Most stork research focused on breeding ecology, but was skewed toward only three species. Growing research in Asia showed significant populations of several stork species amid farmlands, suggesting the need to advance similar research in anthropogenically modified landscapes elsewhere. The population and behaviour ecologies of 15 (75 %) stork species remain unstudied. Our review showed scientific evidence varying enormously across stork species, with sparse scientific understanding being the norm. Red List statuses must be made more robust for storks, especially highlighting data-deficient species to help prioritize conservation research, particularly in Africa and Asia, thereby facilitating the development of accurate status assessments for these species.
... The expansion of breeding waterbird studies to diverse agricultural landscapes have provided contestations of existing generalised narratives that assumed breeding waterbirds require relatively undisturbed wetlands for nesting and would avoid areas such as tropical and sub-tropical agricultural landscapes with high human population densities. Generalised and widespread narratives unfortunately continue to dominate discussions, even driving status assessments of waterbird species reflecting the relatively sparse research on waterbird requirements on crowded agricultural landscapes (Sundar and Subramanya, 2010;Sundar, 2020). There is an urgent need to develop stronger understanding of such multifunctional traditionally farmed landscapes, particularly from Africa and Asia, that host substantial numbers of waterbird species but have relatively few studies to identify key characteristics that facilitate or deter waterbird breeding (Gula, 2020;Sundar, 2020). ...
... Generalised and widespread narratives unfortunately continue to dominate discussions, even driving status assessments of waterbird species reflecting the relatively sparse research on waterbird requirements on crowded agricultural landscapes (Sundar and Subramanya, 2010;Sundar, 2020). There is an urgent need to develop stronger understanding of such multifunctional traditionally farmed landscapes, particularly from Africa and Asia, that host substantial numbers of waterbird species but have relatively few studies to identify key characteristics that facilitate or deter waterbird breeding (Gula, 2020;Sundar, 2020). ...
... The Woolly-necked Stork (C. episcopus) is a single-nesting waterbird found across large swathes of Africa, and south and south-east Asia that has gained increased scientific attention recently Sundar, 2020). Woolly-necked Storks were thought to be imperilled by agriculture and assumed to require forested reserves (Hancock et al., 1992). ...
Article
Full-text available
Conservation of biodiversity alongside agriculture is now a global priority. Tree-nesting waterbirds have a tenuous relationship with farmlands because their survival requires farmers to retain trees and wetlands amid croplands. Research on such birds is rare on tropical and sub-tropical agricultural landscapes where high human densities and intensive farming ostensibly deteriorate breeding conditions. We explored breeding ecology and nest site selection by the single-nesting Woolly-necked Stork (Ciconia episcopus) in Haryana, north India using 298 nests from 166 locations discovered between 2016 and 2020. We determined the relative strengths of association of nest locations with natural features (trees, wetlands), human presence (habitation) and artificial water sources (irrigation canals) to understand cues used by breeding storks to situate nests. Woolly-necked Stork brood size from 42 successful nests was relatively high (3.1 ± 0.9 SD), with nests close to human habitation and wetlands having smaller broods. Storks showed high nest site fidelity (44.5% of sites used > 1 year), rarely nested on man-made structures (electricity pylons; 8.4%), and distributed nests in a clumped pattern. Woolly-necked Storks situated nests ambivalent to natural features but associated strongly with man-made features (positively with irrigation canals; negatively with human habitation). Contrary to expectations, most nests were not on the tallest trees but on the medium sized, native Dalbergia sissoo though storks situated nests on two tall trees (native Ficus religiosa and exotic Eucalyptus sp.) far more than the trees’ availability. All three tree species were favoured either for traditional agroforestry or local religious beliefs. Traditional agriculture in Haryana supported a substantial breeding population of Woolly-necked Storks facilitated by agriculture-related components rather than existing natural features. This novel scenario contradicts conventional narratives that suggest multi-season small holder tropical and sub-tropical agriculture degrades breeding conditions for waterbirds. Our findings in Haryana reiterate the need to assemble a diverse conservation toolkit of different locally relevant mechanisms supporting biodiversity amid cultivation.
... In particular, such information would greatly contribute to the development of conservation assessments and strategies, as the status of the African Woollyneck is uncertain and in need of assessment. Although the Asian Woollyneck has been recently reassessed with a preliminary decision to be downgraded on the IUCN Red List (Sundar 2020), there is still much to learn about population dynamics, distribution, and the environmental processes that influence them. Therefore, we developed maps of known distribution for both species and compared them to the IUCN maps to assess occurrence more precisely. ...
... Data used for other papers in this issue of SIS Conservation were also used for the analyses, especially the following papers: Katuwal et al. (2020), Kittur and Sundar (2020), and Win et al. (2020). Photographs available on the internet with locational details were also collated by volunteers and data from nearly 1,000 individual records were included for this analysis (see also Sundar 2020). For both species, in cases where records were manually traced in the literature, locations were georeferenced as precisely as possible given the available descriptions. ...
... The positive relationship with precipitation in the warmest quarter could be related to increased stress in late summer as foraging habitat dries leading up to the breeding season. It seems apparent, therefore, that there are seasonal requirements regarding precipitation that have implications for fitness, which also likely explains seasonal variation in group size and habitat use (Sundar 2006; Kittur andSundar 2020). Yet breeding information for Asian Woollynecks is generally scarce, so the scenario in Nepal and India may not be representative of the whole range. ...
Article
Full-text available
Rangewide distribution patterns and environmental requirements of the African Ciconia microscelis and Asian C. episcopus Woollyneck Storks are poorly understood, which has confounded the ability to develop empirical conservation status assessments for either species. We collated thousands of records for each species to create the first objective distribution maps, and used these data to model environmental suitability at the continental and regional scales in Africa and Asia with the machinelearning program MaxEnt. We found the African Woollyneck to be fairly widespread in southern and East Africa but its distribution in West Africa was fragmented. The Asian Woollyneck had a widespread distribution in south Asia, an isolated population segment in Cambodia and Vietnam, and was sparsely distributed on the southeast Asian islands. Predictions of suitable distributions and responses to climate variables in the MaxEnt models were scaledependent for both species. Annual and seasonal precipitation were most important in Africa, and the most influential variables differed across Asian models. Field studies testing these findings will bolster the knowledge of ecological requirements, as well as help determine how responses to environmental variation influence population dynamics. While our findings indicate neither species are of immediate conservation concern, there is evidence of population declines and range fragmentation and contractions in some regions. Understanding factors that have caused these changes is especially important in the face of ongoing environmental change on both continents.
... Despite recognition of the paucity of information on storks worldwide more than thirty years ago (Luthin 1987), all species remain notoriously understudied. Although the mention of these six species throughout many pieces of literature and accounts in prominent sources would give the impression all are well studied (e.g. Brown et al. 1982;Hancock et al. 1992;Hockey et al. 2005), it is not so and is similar to emerging patterns for storks elsewhere (Sundar 2020). In particular, distributions have never been robustly mapped using repeatable methods and the validity and accuracy of current species status assessments remain unknown. ...
... The research bias toward protected areas in Africa is stark and prevents a complete understanding of the reliance that African storks have on these preserves, especially given the significance of rice fields for some other African waterbirds (Wymenga and Zwarts 2010). Indeed, Asian storks are successful in unprotected habitats (especially agricultural land) and even more widespread than in protected areas, highlighting the pressing prerequisite for comparable work in Africa (Sundar 2004(Sundar , 2011Sundar and Kittur 2013;Yamada et al. 2019;Katuwal et al. 2020;Sundar 2020;Win et al. 2020). Additionally, future research must address how the extent and distribution of wetlands influences stork distribution, especially because water surface within protected areas has declined in sub-Saharan Africa (Bastin et al. 2019). ...
Article
Species range maps provided by the IUCN and BirdLife International are recognised to sometimes mischaracterise distribution and have resulted in inaccurate status assessments. In this study we assessed distribution trends and relationships with protected area extent for six African storks, the African Openbill Anastomus lamelligerus, Abdim’s Stork Ciconia abdimii, African Woolly-necked Stork C. microscelis, Saddle-billed Stork Ephippiorhynchus senegalensis, Marabou Stork Leptoptilos crumenifer and Yellow-billed Stork Mycteria ibis. Each of these species is understudied and assumed to be ubiquitous throughout sub-Saharan Africa and therefore considered Least Concern on the IUCN Red List. We developed empirically based distribution maps for the six African stork species using a plethora of data sources from >150 years. We found all six species were widespread from East to Southern Africa, but had highly fragmented ranges in West Africa. West African populations have either declined or been extirpated since the 1960s. Countries that require better field coverage include Angola, the Democratic Republic of Congo, Somalia, South Sudan, Sudan and Zimbabwe. For each species, there was a positive relationship between occurrence and protected area extent, suggesting either protected habitat is important for storks or unprotected areas are poorly covered in the field. We evaluate species status based on the new collated information and recommend uplisting the global status of the Saddle-billed Stork to Near Threatened and West African populations of the Saddle-billed Stork, Marabou Stork and Yellow-billed Stork to Threatened status.
... A large number of waterbirds resident in India, a location where the report underscores a declining trend, remain very poorly studied with even basic natural history being unknown (see Marcot et al. 2022). Recent work in Africa and Asia on stork species showed the Red List to be inconsistent, and also show that the process of changing status on the IUCN Red List was not always based on science or knowledge provided by in-country experts (Sundar 2020;Gula et al. 2022). There is growing work showing the IUCN Red List information either being too conservative (e.g. for shorebirds; Duan et al. 2022) or too strict (e.g. ...
... These owls breed on large nests built by other species, primarily other raptors such as kites, eagles, and vultures (Ali & Ripley, 2001;König & Weick, 2008). The Woolly-necked Stork is a single-nesting stork that was, until recently, incorrectly assumed to need wetlands inside protected reserves to survive (see Sundar, 2020). However, recent work in South Africa showed that the storks used trees inside gardens (Thabethe, 2018), and in South Asia, they largely occur in farmlands breeding on trees used for agroforestry (Kittur & Sundar, 2020. ...
Article
Large raptors frequently reuse nests of other species, but their reliance on nests of largely one species is unusual. In this natural history note, we describe a novel commensal relationship where nests built by Woolly-necked Storks were preferentially reused by Dusky Eagle-owls. Owls showed distinct patterns of preference for both the nest tree species and the location of the nest tree relative to storks’ choices. These observations were made in an ancient cultivated landscape suggesting that novel inter-species interactions may evolve even in extensively human-modified tropical systems.
... One of the species that was recently elevated to the status of "Vulnerable", partly due to assumptions that its forest and undisturbed wetland habitats were being lost to agriculture, is the Woollynecked Stork Ciconia episcopus (BirdLife International 2020). This stork species is one of the least studied large waterbirds globally with a vast majority of information on its ecology constituting anecdotal observations (BirdLife International 2020; Sundar 2020. Until very recently, Woollynecked Storks were assumed to need undisturbed areas such as forests with wetlands or large protected wetland reserves. ...
Article
Full-text available
Crowded agricultural landscapes of the tropics and subtropics are assumed to be responsible for the decline of many waterbird species. This includes Woollynecked Storks, one of the least studied large waterbirds, with no longterm multiscale information on its ecology. In this study we provide densities, population size, flock size and habitat use of the species in agricultural landscapes across seven districts in lowland Nepal and India using the largest available field data set of Woollynecked Stork observations (N = 8,906 individuals in 3,133 flocks observed seasonally between 2014 and 2019). With this data, we asked whether these metrics showed variation by season and location. Woollynecked Stork densities fluctuated considerably, both with season in each location and across locations. Estimated population of Woollynecked Storks in the study area was 1,689 ± 922 (SD) which extrapolated to the known distribution range of the species in south Asia provided a coarse population estimate of 2,38,685 ± 1,24,471 (SD). Woollynecked Storks were seen mostly in small flocks of 14 birds (86% of flocks) with few extraordinarily large flocks. Flocks were significantly larger in Jhajjar and Kheda districts, in winter, and in fallow fields and wetlands. Most Woollynecked Storks were observed in agriculture fields (64% of 1,874 observations) with much fewer in wetlands (9%). In three locations where seasonal habitat use was measured, Woollynecked Storks varied habitat use seasonally in all locations. Of six locations where habitat preference was assessed, storks preferred wetlands in five locations. Results of this study suggest that the largest known global population of this species is resident in agricultural landscapes, and coarse population estimates suggests that the population size of this species was previously underestimated. Results also showed considerable variations in flock size and habitat use with location and season suggesting that Woolly necked Storks show plasticity in response to changing conditions on agricultural landscapes. These findings will be helpful to revise the species' status assessment and understanding its conservation requirements.
... We are also excited to introduce the "Special Section" where a number of short notes and papers provide the first ever detailed description of natural history, ecology and conservation status of the Woollynecked Stork Ciconia episcopus from several locations in south and southeast Asia. Significantly, the information provided for this Special Section was used to evaluate the conservation status of the species, and succeeded in convincing the Red List authorities that the Woollynecked Stork requires to be downlisted from "Vulnerable" to "Nearthreatened" (Sundar 2020). ...
Article
Full-text available
The Editorial introduced Issue 2 of the publication SIS Conservation (published by the IUCN SSC Storks, Ibis and Spoonbill Specialist Group).
Article
Tropical farmlands experience dramatic seasonal variations in landscape conditions and have continuous human presence, providing potentially challenging settings for resident waterbirds. Behavior of the globally threatened Woolly-necked Stork (Ciconia episcopus) was studied for two seasons (monsoon and winter, 2018–2019) in lowland Nepal to assess how storks coped with changing conditions on farmlands. Activity budgets were prepared from 582 min of video, and recursive partitioning was used to identify variables that affected two critical activities: foraging and vigilance. Foraging was a dominant activity (32 ± 33%) with relatively little percent time spent being vigilant (10 ± 19%). Woolly-necked Storks reduced percent foraging time when they foraged closer (25.8 ± 36.3%) compared to farther (35.8 ± 31.8%) from wetlands. Percent foraging time was reduced during the winter (30.6 ± 35.2%) compared to monsoon (35.1 ± 32.2%), suggesting improved foraging conditions. Percent time spent foraging increased closer to humans, suggesting lower efficiency. Percent time being vigilant decreased closer to wetlands, suggesting reduced disturbance. Wetlands and drier cropfields with human presence were relatively high-value habitats. Woolly-necked Storks coped with changing seasonal conditions in lowland Nepal’s farmlands by altering activity budgets in relatively minor ways identical to alterations made by similar species in wild habitats. This work adds to growing literature showcasing the multifunctional value of tropical agricultural landscapes and underscoring the need to move away from assuming that agriculture is uniformly detrimental for large waterbirds.
Article
Full-text available
Protected areas form the backbone of biodiversity conservation especially in southeast Asia which is both a global biodiversity hotspot and is facing extreme developmental pressures. The ability of large waterbirds to use habitats outside protected areas is poorly understood in most southeast Asian countries despite the potential of humanmodified areas such as agricultural fields to provide alternative habitats. We assessed abundance and habitat use inside and outside protected areas of Woollynecked Storks, a large waterbird species thought to be declining due to deterioration of forested reserves, in five regions of Myanmar. Woollynecked Stork abundance (birds/km) and use of three habitats (agriculture fields, forests, wetlands) were compared using transects within and outside protected areas, each monitored six times annually for three continuous years (2016-2018). Specifically, we assessed if abundance and habitat use varied due to protection status and whether location, season (summer, winter, and rainy season) and time of day (morning and evening) additionally influenced measured metrics. Woollynecked Storks were seen in 55% of all transects, but in the 990 total transect runs, were seen in only 44% of transects with a higher frequency of sightings on transects outside (61%) compared to inside protected areas (25%). Encounter rates were, on average, 1.5 times higher outside compared to inside protected areas. Encounter rates also varied significantly with season with most storks being encountered in summers and the least in the winters, and seasonal patterns were similar inside and outside protected areas. Encounter rates showed weak declining trends in the majority of transects with measured declines being more than twice inside protected areas than outside. Woollynecked Storks were mostly observed in wetlands (53%) and in agricultural fields (35%) and used forested areas and wetlands significantly more inside protected areas. Storks displayed plasticity outside protected areas by using agricultural fields. This study provides the first formal comparison of Woollynecked Stork ecology inside and outside protected areas. In addition to continuing to secure protected areas for biodiversity conservation in Myanmar, expanding the conservation paradigm into agricultural landscapes with unprotected wetlands is essential for the longterm persistence of large waterbird species such as the Woollynecked Storks.
Article
Full-text available
Rangewide distribution patterns and environmental requirements of the African Ciconia microscelis and Asian C. episcopus Woollyneck Storks are poorly understood, which has confounded the ability to develop empirical conservation status assessments for either species. We collated thousands of records for each species to create the first objective distribution maps, and used these data to model environmental suitability at the continental and regional scales in Africa and Asia with the machinelearning program MaxEnt. We found the African Woollyneck to be fairly widespread in southern and East Africa but its distribution in West Africa was fragmented. The Asian Woollyneck had a widespread distribution in south Asia, an isolated population segment in Cambodia and Vietnam, and was sparsely distributed on the southeast Asian islands. Predictions of suitable distributions and responses to climate variables in the MaxEnt models were scaledependent for both species. Annual and seasonal precipitation were most important in Africa, and the most influential variables differed across Asian models. Field studies testing these findings will bolster the knowledge of ecological requirements, as well as help determine how responses to environmental variation influence population dynamics. While our findings indicate neither species are of immediate conservation concern, there is evidence of population declines and range fragmentation and contractions in some regions. Understanding factors that have caused these changes is especially important in the face of ongoing environmental change on both continents.
Article
Full-text available
Crowded agricultural landscapes of the tropics and subtropics are assumed to be responsible for the decline of many waterbird species. This includes Woollynecked Storks, one of the least studied large waterbirds, with no longterm multiscale information on its ecology. In this study we provide densities, population size, flock size and habitat use of the species in agricultural landscapes across seven districts in lowland Nepal and India using the largest available field data set of Woollynecked Stork observations (N = 8,906 individuals in 3,133 flocks observed seasonally between 2014 and 2019). With this data, we asked whether these metrics showed variation by season and location. Woollynecked Stork densities fluctuated considerably, both with season in each location and across locations. Estimated population of Woollynecked Storks in the study area was 1,689 ± 922 (SD) which extrapolated to the known distribution range of the species in south Asia provided a coarse population estimate of 2,38,685 ± 1,24,471 (SD). Woollynecked Storks were seen mostly in small flocks of 14 birds (86% of flocks) with few extraordinarily large flocks. Flocks were significantly larger in Jhajjar and Kheda districts, in winter, and in fallow fields and wetlands. Most Woollynecked Storks were observed in agriculture fields (64% of 1,874 observations) with much fewer in wetlands (9%). In three locations where seasonal habitat use was measured, Woollynecked Storks varied habitat use seasonally in all locations. Of six locations where habitat preference was assessed, storks preferred wetlands in five locations. Results of this study suggest that the largest known global population of this species is resident in agricultural landscapes, and coarse population estimates suggests that the population size of this species was previously underestimated. Results also showed considerable variations in flock size and habitat use with location and season suggesting that Woolly necked Storks show plasticity in response to changing conditions on agricultural landscapes. These findings will be helpful to revise the species' status assessment and understanding its conservation requirements.
Article
Full-text available
Asian Woollyneck Ciconia episcopus is a globally threatened stork found across south and southeast Asian countries. In Nepal, it is considered as a fairly common resident species although categorized as ‘NearThreatened’. Here, we report on Asian Woollyneck occurrences in 116 transects (farmland100, forest8, river8) each measuring 500 m across four districts of lowland Nepal (Kapilvastu, Chitwan, Sarlahi and Sunsari) and surveyed in multiple seasons from April 2018 to December 2019 for a total of 985 transect counts. Despite our extensive survey, we recorded Asian Woollynecks in only 14 transect counts of which eight were along the buffer zone of Chitwan National Park (CNP). All sightings were of small flocks with 1-2 storks. Majority of the sightings (85%) were in farmlands, remaining in river but not in forest. We observed one nest on a Sal Shorea robusta tree along the buffer zone of CNP in 2019 from which one chick fledged in early October. Our study adds to the meager information available on Asian Wollyneck in Nepal and indicates that this species is sparsely distributed in the lowland farmlands.
Article
Full-text available
Woollynecked Stork Ciconia episcopus is a tropical species which has its distribution range in south Asia and southeast Asia with a stronghold of its population in India, Sri Lanka, Nepal, Myanmar, Thailand, and Indonesia. It inhabits a wide range of habitat from wetlands, rivers, ponds, tanks, mudflats, and agricultural fields. Despite its population having a strong presence in India, little is known about their habitat preferences, nesting, and foraging behavior. This paper reports observations about the habitat use and observation of a previously unknown foraging habit of the species in northern India. Wetlands (58.3 % of sightings) and agricultural fields (37.5 % of sightings) were found to be the most occupied habitats with an average flock size of 1.87 ± 0.25. This study also reports an unusual feeding behavior among Woollynecked Stork which may be a true scavenging behavior or an opportunistic feeding of insects from an animal carcass. Woollynecked Storks appear to be relatively plastic in their ability to use both wetlands and agricultural fields and being able to scavenge when the opportunity was available. Detailed studies on habitat use and foraging requirements of the species are missing and are required to assist with developing a better ecological understanding of the species.
Article
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Asian Woollyneck Ciconia episcopus is listed as a globally Vulnerable bird species and there is very little detailed information about its ecology, including basic aspects such as distribution and seasonal movements. In this paper, we assembled primary and secondary information on the species focusing on the Indian northeastern state of Assam and provide a preliminary understanding of its movement, distribution and breeding in Assam. We collated our individual field observations from 2010 to 2020 in five districts, invited responses from experienced birdwatchers using a standard questionnaire, and downloaded available data provided by volunteers on online portals. Asian Woollynecks were seen in Assam largely in the months of November to April with comparatively fewer sightings in other months. Most observations were in Kaziranga National Park which is one of the most visited national parks by tourists and birdwatchers. No confirmed breeding record was available of the species in Assam. Observed flock sizes were mostly 1-2 birds, with a much higher average flock size in Sonitpur district. The collated data suggests that the Asian Woollyneck is a seasonal nonbreeding migrant to Assam occurring largely during the winter months..
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