About
200
Publications
72,210
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
635
Citations
Citations since 2017
Introduction
Yvonne A. de Jong is co-leader of the Eastern Africa Primate Diversity and Conservation Program, Nanyuki, Kenya. Main research focus is the biogeography, diversity and conservation of eastern Africa's primates and several other groups of large mammals, including the warthogs, hyrax, springhare and dik diks. Member of the National Primate Task Force of Kenya, and various IUCN/SSC Specialist Groups (including primates, wild pigs and afrotheria). More information, publications and photographic maps (primates, warthogs and hyrax) on www.wildsolutions.nl or see www.lolldaiga.com
Additional affiliations
January 2003 - June 2015
Lolldaiga Hills Research Programme
Position
- Co-leader
Education
January 2011 - June 2012
September 2002 - June 2004
Oxford Brookes University
Field of study
- Primatology
August 1992 - June 1996
Publications
Publications (200)
Illustrations by Stephen D. Nash. 36 taxa, 20 maps, 3 vocal profiles and a checklist
Two species of warthog are currently widely recognised, the poorly known desert warthog Phacochoerus aethiopicus and the widely distributed common warthog Phacochoerus africanus. Spatial data for both species were collected during field surveys and from the literature, museums, colleagues, naturalists, local experts, and online resources to assess...
Estimating population densities and their trends over time is essential for understanding primate ecology and for guiding conservation efforts. From 2011 through to 2019, we counted two guenon species during seasonal road transect surveys in Lake Manyara National Park: the Tanzania-endemic Manyara monkey Cercopithecus mitis manyaraensis (Internatio...
African wild pigs have a contentious evolutionary and biogeographic history. Until recently, desert warthog (Phacochoerus aethiopicus) and common warthog (P. africanus) were considered a single species. Molecular evidence surprisingly suggested they diverged at least 4.4 million years ago, and possibly outside of Africa. We sequenced the first whol...
In 2020, a new subspecies was described in the Cercopithecus mitis complex, the Manyara monkey C. m. manyaraensis, Butynski & De Jong, 2020. The internal taxonomy of this species complex is still debated, and the phylogenetic relationships among the taxa are unclear. Here we provide the first mitochondrial sequence data for C. m. manyaraensis to de...
The Colobines are a group of Afroeurasian monkeys that exhibit extraordinary behavioural and ecological diversity. With long tails and diverse colourations, they are medium-sized primates, mostly arboreal, that are found in many different habitats, from rain forests and mountain forests to mangroves and savannah. Over the last two decades, our unde...
Chlorocebus djamdjamensis. The IUCN Red List of Threatened Species 2022: e.T4240A205910680. Available at: https://www.iucnredlist.org/species/4240/205910680
Chlorocebus djamdjamensis ssp. harennaensis. The IUCN Red List of Threatened Species 2022: e.T205910110A205910458. Available at: https://www.iucnredlist.org/species/205910110/205910458
Chlorocebus djamdjamensis ssp. djamdjamensis. The IUCN Red List of Threatened Species 2022: e.T205910256A205910259. Available at: https://www.iucnredlist.org/species/205910256/205910259
The IUCN Red List of Threatened Species in 2022. Available at: https://www.iucnredlist.org/species/205893280/205893339
The IUCN Red List of Threatened Species 2022. Available at: https://www.iucnredlist.org/species/174391079/217739569
Chlorocebus aethiops. The IUCN Red List of Threatened Species 2022: e.T4233A214886892. Available at: https://www.iucnredlist.org/species/4233/214886892
Chlorocebus aethiops ssp. aethiops. The IUCN Red List of Threatened Species 2022: e.T215123466A215532941. Available at: https://www.iucnredlist.org/species/215123466/215532941
Chlorocebus aethiops ssp. matschiei. The IUCN Red List of Threatened Species 2022: e.T215119320A215119500. Available at: https://www.iucnredlist.org/species/215119320/215119500
Chlorocebus pygerythrus ssp. zavattarii. The IUCN Red List of Threatened Species 2022: e.T205895889A205895642. Available at: https://www.iucnredlist.org/species/205895889/205895642
Chlorocebus pygerythrus ssp. hilgerti. The IUCN Red List of Threatened Species 2022: e.T92252725A205896205. Available at: https://www.iucnredlist.org/species/92252725/205896205
Chlorocebus pygerythrus. The IUCN Red List of Threatened Species 2022: e.T136271A205998680. Available at: https://www.iucnredlist.org/species/136271/205998680
Desert warthog Phacochoerus aethiopicus delamerei and common warthog Phacochoerus africanus are widespread and locally common in the Horn of Africa and Kenya, east of the Eastern Rift Valley. It is of particular interest that these two taxa, the only two extant species in the genus Phacochoerus, occur in sympatry in some regions. Within Kenya, symp...
The classification of most mammalian orders and families is under debate and the number of species is likely greater than currently recognized. Improving taxonomic knowledge is crucial, as biodiversity is in rapid decline. Morphology is a source of taxonomic knowledge, and geometric morphometrics applied to two dimensional (2D) photographs of anato...
The "Critically Endangered" southern patas monkey Erythrocebus baumstarki, thought to be endemic to Tanzania, has been resurrected to species level based on its geographic isolation, and on the coloration and pattern of its pelage. This study presents the first evidence for E. baumstarki in Kenya and reviews its historic and current geographic dist...
Fact sheet concerning the geography, environment, and biodiversity of Laikipia County, central Kenya.
New desert warthog (Phacochoerus aethiopicus) records for Laikipia County, Kenya
en The paucity of studies on Egyptian mongoose Herpestes ichneumon (Linnaeus, 1758) in Africa highlights the need for baseline information on the geographic range of this species as well as factors that may determine its distribution. This study presents eight novel locality records of H. ichneumon in Laikipia County, central Kenya, addresses quest...
The paucity of studies on Egyptian mongoose Herpestes ichneumon (Linnaeus, 1758) in Africa highlights the need for baseline information on the geographic range of this species as well as factors that may determine its distribution. This study presents eight novel locality records of H. ichneumon in Laikipia County, central Kenya, addresses question...
De Jong, Y.A. & Butynski, T.M. 2020. Erythrocebus baumstarki. The IUCN Red List of Threatened Species 2020: e.T92252436A92252442. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T92252436A92252442.en.
De Jong, Y.A. & Butynski, T.M. 2020. Erythrocebus patas ssp. pyrrhonotus. The IUCN Red List of Threatened Species 2020: e.T92252480A92252486. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T92252480A92252486.en.
De Jong, Y.A., Rylands, A.B. & Butynski, T.M. 2020. Erythrocebus patas. The IUCN Red List of Threatened Species 2020: e.T174391079A17940998. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T174391079A17940998.en.
Butynski, T.M., de Jong, Y.A., Wieczkowski, J. & King, J. 2020. Cercocebus galeritus. The IUCN Red List of Threatened Species 2020: e.T4200A17956330. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T4200A17956330.en.
De Jong, Y.A. & Butynski, T.M. 2020. Cercopithecus mitis ssp. boutourlinii. The IUCN Red List of Threatened Species 2020: e.T136901A17984314. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T136901A17984314.en.
De Jong, Y.A. & Butynski, T.M. 2020. Cercopithecus mitis ssp. heymansi. The IUCN Red List of Threatened Species 2020: e.T136877A17984444. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T136877A17984444.en.
Butynski, T.M. & de Jong, Y.A. 2020. Cercopithecus mitis ssp. kandti. The IUCN Red List of Threatened Species 2020: e.T4236A92571626. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T4236A92571626.en.
De Jong, Y.A. & Butynski, T.M. 2020. Cercopithecus mitis ssp. manyaraensis. The IUCN Red List of Threatened Species 2020: e.T95596261A95596266. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T95596261A95596266.en.
De Jong, Y.A. & Butynski, T.M. 2020. Chlorocebus tantalus ssp. marrensis. The IUCN Red List of Threatened Species 2020: e.T92252560A92252566. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T92252560A92252566.en.
Butynski, T.M. & de Jong, Y.A. 2020. Cercopithecus mitis ssp. opisthostictus. The IUCN Red List of Threatened Species 2020: e.T136850A17984531. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T136850A17984531.en.
De Jong, Y.A. & Butynski, T.M. 2020. Cercopithecus mitis ssp. zammaronoi. The IUCN Red List of Threatened Species 2020: e.T136925A92569723. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T136925A92569723.en.
De Jong, Y.A., Cunneyworth, P., Butynski, T.M., Maisels, F., Hart, J.A. & Rovero, F. 2020. Colobus angolensis. The IUCN Red List of Threatened Species 2020: e.T5142A17945007. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T5142A17945007.en.
Butynski, T.M. & de Jong, Y.A. 2020. Colobus angolensis ssp. nov.. The IUCN Red List of Threatened Species 2020: e.T40041A17983333. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T40041A17983333.en.
De Jong, Y.A. & Butynski, T.M. 2020. Colobus angolensis ssp. prigoginei. The IUCN Red List of Threatened Species 2020: e.T5149A17983440. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T5149A17983440.en.
Rovero, F., Davenport, T., de Jong, Y.A. & Butynski, T.M. 2020. Colobus angolensis ssp. sharpei. The IUCN Red List of Threatened Species 2020: e.T92576098A92576128. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T92576098A92576128.en.
Butynski, T.M. & de Jong, Y.A. 2020. Colobus angolensis ssp. ruwenzorii. The IUCN Red List of Threatened Species 2020: e.T5147A17983385. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T5147A17983385.en.
Butynski, T.M. & de Jong, Y.A. 2020. Colobus guereza ssp. dodingae. The IUCN Red List of Threatened Species 2020: e.T136880A17983306. https://dx.doi.org/10.2305/IUCN.UK.2020-2.RLTS.T136880A17983306.en.
The complex taxonomy and biogeography of the highly polytypic and widespread gentle monkey Cercopithecus mitis continue to be debated. Tanzania and Kenya, together, support eight of the currently recognized 17 subspecies of C. mitis. This paper reviews the taxonomy of the eight subspecies of C. mitis recognized for Kenya and Tanzania and presents a...
Butynski, T.M. & de Jong, Y.A. 2019. Otolemur garnettii ssp. lasiotis. The IUCN Red List of Threatened Species 2019: e.T136900A17989378.
Website: https://www.iucnredlist.org/species/136900/17989378
De Jong, Y.A. & Butynski, T.M. 2019. Otolemur garnettii ssp. panganiensis. The IUCN Red List of Threatened Species 2019: e.T136859A17989463.
Website: https://www.iucnredlist.org/species/136859/17989463
De Jong, Y.A. & Butynski, T.M. 2019. Otolemur garnettii ssp. kikuyuensis. The IUCN Red List of Threatened Species 2019: e.T136911A17989434.
Website: https://www.iucnredlist.org/species/136911/17989434
Butynski, T.M. & de Jong, Y.A. 2019. Otolemur garnettii ssp. garnettii. The IUCN Red List of Threatened Species 2019: e.T136855A17989407.
Website: https://www.iucnredlist.org/species/136855/17989407
de Jong, Y.A. & Butynski, T.M. 2019. Perodicticus ibeanus ssp. ibeanus. The IUCN Red List of Threatened Species 2019: e.T95706286A95706330.
Website: https://www.iucnredlist.org/species/95706286/95706330
Butynski, T.M. & de Jong, Y.A. 2019. Perodicticus ibeanus ssp. stockleyi. The IUCN Red List of Threatened Species 2019: e.T136932A17991738.
Website: https://www.iucnredlist.org/species/136932/17991738
De Jong, Y.A. & Butynski, T.M. 2019. Colobus guereza ssp. kikuyuensis. The IUCN Red List of Threatened Species 2019: e.T136883A17983148.
Website: https://www.iucnredlist.org/species/136883/17983148
Butynski, T.M. & de Jong, Y.A. 2019. Colobus guereza ssp. matschiei. The IUCN Red List of Threatened Species 2019: e.T136846A17983227.
Website: https://www.iucnredlist.org/species/136846/17983227
Butynski, T.M. & de Jong, Y.A. 2019. Galago senegalensis ssp. dunni. The IUCN Red List of Threatened Species 2019: e.T136872A17989210.
Website: https://www.iucnredlist.org/species/136872/17989210
Butynski, T.M. & de Jong, Y.A. 2019. Galago senegalensis ssp. braccatus. The IUCN Red List of Threatened Species 2019: e.T136863A17989264.
Website: https://www.iucnredlist.org/species/136863/17989264
De Jong, Y.A., Butynski, T.M. & Svensson, M. 2019. Galago senegalensis ssp. senegalensis. The IUCN Red List of Threatened Species 2019: e.T136897A17989183.
Website: https://www.iucnredlist.org/species/136897/17989183
De Jong, Y.A. & Butynski, T.M. 2019. Galago senegalensis ssp. sotikae. The IUCN Red List of Threatened Species 2019: e.T136904A17989237.
Website: https://www.iucnredlist.org/species/136904/17989237
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus ascanius ssp. whitesidei. The IUCN Red List of Threatened Species 2019: e.T136947A17985009.
Website: https://www.iucnredlist.org/species/136947/17985009
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus ascanius ssp. ascanius. The IUCN Red List of Threatened Species 2019: e.T136886A17984986.
Website: https://www.iucnredlist.org/species/136886/17984986
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus ascanius ssp. atrinasus. The IUCN Red List of Threatened Species 2019: e.T136869A17984959.
Website: https://www.iucnredlist.org/species/136869/17984959
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus ascanius ssp. schmidti. The IUCN Red List of Threatened Species 2019: e.T136917A17984930.
Website: https://www.iucnredlist.org/species/136917/17984930
De Jong, Y.A. & Butynski, T.M. 2019. Cercopithecus ascanius ssp. katangae. The IUCN Red List of Threatened Species 2019: e.T136868A17984907.
Website: https://www.iucnredlist.org/species/136868/17984907
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. albogularis. The IUCN Red List of Threatened Species 2019: e.T40645A17984699.
Website: https://www.iucnredlist.org/species/40645/17984699
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. doggetti. The IUCN Red List of Threatened Species 2019: e.T136861A92570828.
Website: https://www.iucnredlist.org/species/136861/92570828
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. albotorquatus. The IUCN Red List of Threatened Species 2019: e.T39990A17984259.
Website: https://www.iucnredlist.org/species/39990/17984259
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. moloneyi. The IUCN Red List of Threatened Species 2019: e.T96189741A92568873.
Website: https://www.iucnredlist.org/species/96189741/92568873
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. monoides. The IUCN Red List of Threatened Species 2019: e.T136942A92569080.
Website: https://www.iucnredlist.org/species/136942/92569080
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. kolbi. The IUCN Red List of Threatened Species 2019: e.T136927A92565137.
Website: https://www.iucnredlist.org/species/136927/92565137
Butynski, T.M. & de Jong, Y.A. 2019. Cercopithecus mitis ssp. stuhlmanni. The IUCN Red List of Threatened Species 2019: e.T96183584A17984287.
Website: https://www.iucnredlist.org/species/96183584/17984287
De Jong, Y.A. & Butynski, T.M. 2019. Chlorocebus pygerythrus ssp. nesiotes. The IUCN Red List of Threatened Species 2019: e.T92252747A92252754.
Website: https://www.iucnredlist.org/species/92252747/92252754
Butynski, T.M. & de Jong, Y.A. 2019. Chlorocebus pygerythrus ssp. rufoviridis. The IUCN Red List of Threatened Species 2019: e.T92252798A92252804.
Website: https://www.iucnredlist.org/species/92252798/92252804
Butynski, T.M. & de Jong, Y.A. 2019. Chlorocebus pygerythrus ssp. hilgerti. The IUCN Red List of Threatened Species 2019: e.T92252725A92252731.
Website: https://www.iucnredlist.org/species/92252725/92252731
Butynski, T.M. & de Jong, Y.A. 2019. Chlorocebus pygerythrus ssp. pygerythrus. The IUCN Red List of Threatened Species 2019: e.T92252770A92252777.
Website: https://www.iucnredlist.org/species/92252770/92252777
Cercopithecus mitis. The IUCN Red List of Threatened Species 2019: e.T4221A17946784.
Website: https://www.iucnredlist.org/species/4221/17946784
The IUCN Red List of Threatened Species 2019: e.T4212A17947340.
Website: https://www.iucnredlist.org/species/4212/17947340
Chlorocebus pygerythrus. The IUCN Red List of Threatened Species 2019: e.T136271A17957823.
Website: https://www.iucnredlist.org/species/136271/17957823
De Jong, Y.A. & Butynski, T.M. 2019. Galago gallarum . The IUCN Red List of Threatened Species 2019: e.T8786A17963185.
Website: https://www.iucnredlist.org/species/8786/17963185
Butynski, T.M. & de Jong, Y.A. 2019. Galago matschiei . The IUCN Red List of Threatened Species 2019: e.T8787A17963414
Website: https://www.iucnredlist.org/species/8787/17963414
De Jong, Y.A., Butynski, T.M. & Oates, J.F. 2019. Colobus guereza . The IUCN Red List of Threatened Species 2019: e.T5143A17944705.
Website: https://www.iucnredlist.org/species/5143/17944705
de Jong, Y.A., Butynski, T.M., Svensson, M. & Perkin, A. 2019. Galago senegalensis . The IUCN Red List of Threatened Species 2019: e.T8789A17963505.
Website: https://www.iucnredlist.org/species/8789/17963505
Butynski, T.M. & de Jong, Y.A. 2019. Paragalago cocos . The IUCN Red List of Threatened Species 2019: e.T136212A17963050.
Website: https://www.iucnredlist.org/species/136212/17963050
De Jong, Y.A., Butynski, T.M. & Perkin, A. 2019. Paragalago granti . The IUCN Red List of Threatened Species 2019: e.T91970347A17962454.
Website: https://www.iucnredlist.org/species/91970347/17962454
De Jong, Y.A., Butynski, T.M., Perkin, A. & Svensson, M. 2019. Otolemur garnettii . The IUCN Red List of Threatened Species 2019: e.T15644A17963837.
Website: https://www.iucnredlist.org/species/15644/17963837
De Jong, Y.A., Butynski, T.M., Perkin, A., Svensson, M. & Pimley, E. 2019. Perodicticus ibeanus. The IUCN Red List of Threatened Species 2019: e.T136875A91996195. Website: https://www.iucnredlist.org/species/136875/91996195
Butynski, T.M., de Jong, Y.A. & King, J. 2019. Piliocolobus rufomitratus . The IUCN Red List of Threatened Species 2019: e.T136939A92659400.
Website: https://www.iucnredlist.org/species/136939/92659400
Gnusletter, Antelope Specialist Group.
Distribution of Lelwel hartebeest Alcelaphus buselaphus lelwel on Lolldaiga Hills Ranch, Laikipia County, central Kenya.
Like other nocturnal primates, many species of galago (Galagidae) are phenotypi-cally cryptic, making their taxonomic status difficult to resolve. Recent taxonomic work has disentangled some of the confusion. This has resulted in an increase in the number of recognised galago species. The most widespread galago species, and indeed the most widespre...
Bi-monthly newsletter of the Lolldaiga Hills Research Programme, Laikipia, Kenya
Vocal repertoires and call structure can provide insights into the behaviour and evolution of species, as well as aid in taxonomic classification. Nocturnal primates have large vocal repertoires. This suggests that acoustic communication plays an important role in their life histories. Little is known about the behavioural context or the intraspeci...
Introduction Laikipia County (ca. 9,700 km²), central Kenya, comprises a highly diverse landscape of grassland, bushland, woodland, dry forest, moist forest, riverine forest, wetland, and farmland. Mean annual rainfall ranges from 40 cm in the north to 120 cm in the southeast and southwest. Although mean annual rainfall is >80 cm in the southeast a...
Kenya has a rich mammalian fauna. We reviewed recently published books and papers including the six volumes of Mammals of Africa to develop an up-to-date annotated checklist of all mammals recorded from Kenya. A total of 390 species have been identified in the country, including 106 species of rodents, 104 species of bats, 63 species of even-toed u...
Biogeography and natural history of the desert warthog and common warthog in the Horn of Africa
Questions
Question (1)
We are looking for a detailed elevation shapefile (ArcGIS) for Kenya and the Horn of Africa. Does anyone know where to obtain such a map?
Projects
Projects (4)
We are a group of researchers, students, and alumni interested in primate conservation and that are linked to the MSc in Primate Conservation at Oxford Brookes University in the UK.
As a network we aim to improve our knowledge of primates, their conservation needs, and to assess and implement actions and policies that will benefit primates, their habitats, and the people that live side-by-side with primates.
The Lolldaiga Hills Research Programme (LHRP) was initiated on 1st August 2013 as part of the research arm of the Sustainability Centre Eastern Africa (SCEA). The goal of the LHRP is to maintain, if not enhance, the conservation values of the LHCL over the long-term, while allowing for the sustainable use of the landscape’s natural resources. The LHRP will (1) establish climatic, ecological, and land-use baselines, and document and evaluate climatic, ecological, and land-use change, its direction (trend), its extent, and its significance (impact), (2) undertake and support applied ecological research, particularly on threatened species and habitats, and (3) conduct and support research relevant to the sustainable use of, and reclamation of, natural resources.
The Eastern Africa Primate Diversity and Conservation Program is a long term research program based in Kenya. The program, founded in 2003, focuses mainly on primate biogeography, diversity, taxonomy and conservation in Kenya, Uganda and Tanzania. However, the program also looks into the biogeography of other African mammals including the desert warthog, various antilope species and the African golden cat.