Simon Mahood

Simon Mahood
Wildlife Conservation Society | WCS · Center for Global Conservation

Doctor of Philosophy

About

54
Publications
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Introduction
Based in Cambodia, where I work for WCS. I enjoy birding and publish on bird natural history in my spare time.

Publications

Publications (54)
Article
Full-text available
Ex situ conservation of species is risky and expensive, but it can prevent extinction when in situ conservation fails. We used the IUCN Guidelines on the Use of Ex Situ Management for Species Conservation to evaluate whether to begin ex situ conservation for the South-east Asian subspecies of Bengal florican Houbaropsis bengalensis blandini, which...
Preprint
The Masked Finfoot Heliopais personatus is among Asia's most threatened waterbird. The species formerly ranged widely across northeast India, Bangladesh and Southeast Asia, but recent records are few. In this review, we aim to address the gaps in knowledge on the conservation status and ecology of the Masked Finfoot by (1) synthesizing recent infor...
Article
Full-text available
The Masked Finfoot Heliopais personatus is among Asia’s most threatened waterbirds. The species formerly ranged widely across north-east India, Bangladesh and South-East Asia, but recent records are few. In this review, we aim to address the gaps in knowledge on the conservation status and ecology of the Masked Finfoot by (1) synthesizing recent in...
Article
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Morphological traits have served generations of biologists as a taxonomic indicator, and have been the main basis for defining and classifying species diversity for centuries. A quantitative integration of behavioural characters, such as vocalizations, in studies on biotic differentiation has arisen more recently, and the relative importance of the...
Article
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The Tonle Sap Lake and Floodplain (TSLF) supports many globally threatened species and its fishery has sustained Cambodia's people for millennia. The rate of habitat loss has accelerated in recent years due to political and economic conditions, and a warming climate and El Niño events that created opportunities for people to burn scrubland at an el...
Article
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Aichi Target 12 of the Convention on Biological Diversity (CBD) contains the aim to ‘prevent extinctions of known threatened species’. To measure the degree to which this was achieved, we used expert elicitation to estimate the number of bird and mammal species whose extinctions were prevented by conservation action in 1993–2020 (the lifetime of th...
Article
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Poisoning causing the decline in South-East Asia’s largest vulture population – CORRIGENDUM - ROBIN LOVERIDGE, GERARD EDWARD RYAN, SUM PHEARUN, OLIVER GRAY-READ, SIMON P. MAHOOD, ALISTAIR MOULD, STEFAN HARRISON, RACHEL CROUTHERS, SOK KO, TOM CLEMENTS, JONATHAN C. EAMES, MATHIEU PRUVOT
Article
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Conservationists increasingly use unstructured observational data, such as citizen science records or ranger patrol observations, to guide decision making. These datasets are often large and relatively cheap to collect, and they have enormous potential. However, the resulting data are generally “messy,” and their use can incur considerable costs, s...
Preprint
Full-text available
Aichi Target 12 of the Convention on Biological Diversity (CBD) aims to 'prevent extinctions of known threatened species'. To measure its success, we used a Delphi expert elicitation method to estimate the number of bird and mammal species whose extinctions were prevented by conservation action in 1993 - 2020 (the lifetime of the CBD) and 2010 - 20...
Article
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We used information derived from expert elicitation to measure progress in conservation of the Bengal Florican (Houbaropsis bengalensis) by calculating six metrics, namely: (a) current threat impact, (b) research need, (c) research achievement, (d) management need, (e) management achievement, and (f) percentage threat reduction. We then used the me...
Article
Fisheries bycatch is a primary driver of cetacean declines, especially for threatened freshwater cetaceans. However, information on the factors influencing cetacean susceptibility to bycatch in small‐scale fisheries is limited, impeding development of evidence‐based conservation strategies. We conducted 663 interviews with fishers from southern Ban...
Data
Occurrence records extracted from selected WCS Cambodia camera trap survey data across four landscapes: the Eastern Plains, the Northern Plains, the Tonle Sap Flooded Forests, and coastal Koh Kong. Temporal coverage from 2001 to 2018, with a total of 101 species recorded. Images not currently published but available on request. Latitudes and longi...
Article
In 2013 a prediction was made that the South-East Asian subspecies of Bengal Florican Houbaropsis bengalensis blandini would be extinct within 10 years. In 2018 we conducted a survey in the Tonle Sap floodplain, Cambodia, of the last population of Bengal Florican in South-East Asia. We found that the rate of decline in displaying males was 55% over...
Article
Full-text available
We developed a method to estimate population abundance from simultaneous counts of unmarked individuals over multiple sites. We considered that at each sampling occasion, individuals in a population could be detected at 1 of the survey sites or remain undetected and used either multinomial or binomial simultaneous-count models to estimate abundance...
Article
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Implementation of REDD+ demonstration projects and completion of the REDD+ readiness process have provided invaluable insights to ensuring the long-term success of the initiative in Cambodia. Benefit sharing should play a central role in REDD+ projects, with a focus on delivering financial and non-financial benefits.These can jointly contribute to...
Article
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We comment on five aspects of Gray et al.’s (Biodivers Conserv, https://doi.org/10.1007/s10531-017-1365-1, 2017a) framework for assessing the readiness of sites for tiger reintroductions. Clarifications in numbers of tigers, available habitat and prey requirements indicate that more land and additional recovery of preferred prey species will be cri...
Article
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Cambodia supports populations of three Critically Endangered vulture species that are believed to have become isolated from the rest of the species’ global range. Until recently Cambodia’s vulture populations had remained stable. However a recent spike in the number of reports of the use of poisons in hunting practices suggests the need to re-evalu...
Article
Cambodian subsistence communities within the Tonle Sap Great Lake area rely on resource extraction from the lake to meet livelihood needs. These fishing communities—many of which consist of dwellings floating on the lake—face potentially profound livelihood challenges because of climate change and changing hydrology due to dam construction for hydr...
Article
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Agriculture threatens biodiversity across the tropics, particularly in semi-natural grassland landscapes, where human populations are high, habitat is easily converted and agriculture is prone to intensification. Over the last 20 years intensive, commercial dry season rice cultivation has emerged as the dominant threat to the Bengal florican Houbar...
Article
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The inherent defencelessness against natural predators of bustards, which have relatively small bills and can neither perch in trees nor take refuge in water at night, renders them warier than other large-bodied birds. They are therefore dependent on large areas of little-disturbed, little-developed open country within which they can see and keep d...
Article
The remaining Indochina population of the Critically Endangered Bengal florican Houbaropsis bengalensis breeds in the floodplain of Cambodia's Tonle Sap Lake. The population has declined substantially but survival rates have not been published previously. Survival could potentially be reduced by the planned construction of high-tension power transm...
Article
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The conservation status of otters in South-east Asia remains poorly known, because of a paucity of records for which certain identification can be confirmed. Otter populations in South-east Asia face a multitude of threats and are in decline; the identification and then protection of sites that support sizeable populations is a priority for their c...
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A female Silver Oriole has been observed in Hanoi at 20.04.2014. The bird on passage is the first record of the species in Vietnam
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There are no published records of pinnipeds in Southeast Asia. Photographs in the national media between January 2010 and December 2013 documented seven pinniped records. All were individuals caught by fishermen in the central part of Vietnam (17°56′N south to 15°23′N). All except one pinniped record can be assigned to Largha ( = Spotted) Seal Phoc...
Article
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A census of the Critically Endangered Bengal Florican Houbaropsis bengalensis was conducted between March and May 2012 on and surrounding the Tonle Sap floodplain in Cambodia, which supports the last extant population of the Indochinese subspecies blandini. We found a decline in the number of displaying males of 44-64% since a comparable estimate f...
Article
The birds' size and shape suggested they were thrushes and the rather striking plumage—blackish and white on the head, with the black of the crown and ear-coverts meeting on the nape, together with brown back and broad white scalloping on the flanks—identified them as Dusky Thrushes Turdus (naumanni) eunomus, a new species for the Philippines.
Article
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Based on distinctive morphological and vocal characters we describe a new species of lowland tailorbird Orthotomus from dense humid lowland scrub in the floodplain of the Mekong, Tonle Sap and Bassac rivers of Cambodia. Genetic data place it in the O. atrogularis-O. ruficeps-O. sepium clade. All data suggest that the new species is most closely rel...
Article
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The number of records of some migratory species is so low that there are insufficient data to infer status, even in countries within their normal distribution. Brown-chested Jungle Flycatcher Rhinomyias brunneatus, a globally threatened bird, is one such species. We gathered data on the occurrence of this species and 13 other migrant flycatchers in...
Article
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Global species loss during the present human-caused mass-extinction far exceeds background rates and is detrimental to human existence. Across the globe, vertebrate extinction risks are highest in South-east Asia. This region has among the world’s fastest recent habitat-loss rates. More of a determinant to the conservation status of many vertebrate...
Article
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A survey of the globally Endangered Collared Laughingthrush Garrulax yersini and Grey-crowned Crocias Crocias langbianis was conducted in May 2009 on the Da Lat Plateau, southern Vietnam. Collared Laughingthrush proved to be common throughout broadleaved evergreen forest habitat within its limited altitudinal distribution while the distribution of...
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The Vietnamese Pheasant Lophura hatinhensis was described in 1975 from one male specimen which was superficially similar to Edwards's Pheasant L. edwardsi but for four white (instead of dark metallic blue) tail feathers. Like L. edwardsi it is poorly known and highly threatened in the wild. Its status as a species has rarely been questioned despite...
Article
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Balancing ever-increasing agricultural and biofuel needs with biodiversity conservation is one of the greatest challenges facing conservation biologists in the 21st century. The conversion of [75 million hectares of forests in Brazilian Amazonia over four decades for agropastoral uses has resulted in the 'creation' of a similar-sized amount of non-...
Article
Full-text available
The Vietnamese Pheasant Lophura hatinhensis was described in 1975 from one male specimen which was superficially similar to Edwards’s Pheasant L. edwardsi but for four white (instead of dark metallic blue) tail feathers. Like L. edwardsi it is poorly known and highly threatened in the wild. Its status as a species has rarely been questioned despite...
Article
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Concerns for the long-term survival of vulture populations on the Indian Subcontinent, owing to widespread poisoning by the veterinary drug diclofenac, have led to increased conservation focus on South-East Asian countries where diclofenac is not used and relict populations of vultures occur. We document here how White-rumped, Slender-billed and Re...
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Global wildlife trade is financially lucrative, frequently illegal and increases the risk for zoonotic disease transmission. This paper presents the first interdisciplinary study of Vietnam's illegal wild bird trade focussing on those aspects which may contribute to the transmission of diseases such as Highly Pathogenic Avian Influenza (HPAI) H5N1....
Article
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There is no formal list of the distribution and status of birds in Vietnam, so the value of records must largely be gauged by comparisons with the works of C. Robson. Birdwatching activity and coverage in the country remains modest, with a bias towards Tonkin and in particular the environs of Hanoi. Records are given for 65 bird species (including...
Article
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Madagascar is a global biodiversity hotspot threatened by forest loss, degradation and fragmentation, all of which are detrimental to the future survival of forest-dwelling organisms. For conservation purposes it is essential to determine how species respond to habitat disturbance, specifically deforestation. In this study we investigated the impac...

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