Yvonne A. de JongEastern Africa Primate Diversity and Conservation Program, Kenya
Yvonne A. de Jong
PhD
About
216
Publications
103,662
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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, warthogs and several other groups of large mammals. Member of various IUCN/SSC Specialist Groups (primates, antelopes, wild pigs and afrotheria). More information, publications and photographic maps (primates, warthogs and hyrax) on www.wildsolutions.nl
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 (216)
Report to Zoological Society for the Conservation of Species and Populations.
This survey was kindly made possible by the inheritance of Michael Amend.
Brief encounter with the extraordinary Pancake Tortoise, locally referred to as ‘Kobe kama Chapati’, in northeast Kenya.
Conservation funding is currently limited; cost-effective conservation solutions are essential. We suggest that the thousands of field stations worldwide can play key roles at the frontline of biodiversity conservation and have high intrinsic value. We assessed field stations’ conservation return on investment and explored the impact of COVID-19. W...
The ‘Endangered’ Grévy’s zebra typically lives in arid and semi-arid grasslands and shrublands, hence our surprise when we encountered Grévy’s zebra in the lush cloud forest of Marsabit National Park.
Blog published on the 26th of February 2024 on www.wildsolutions.nl/marsabit
Sub-Saharan Africa is under-represented in global biodiversity datasets, particularly regarding the impact of land use on species’ population abundances. Drawing on recent advances in expert elicitation to ensure data consistency, 200 experts were convened using a modified-Delphi process to estimate ‘intactness scores’: the remaining proportion of...
Notes Concerning the Second Edition of the Primates of East Africa Pocket Identification Guide
The polytypic Angola colobus Colobus angolensis is a widespread species that, in eastern Africa, is often restricted to small, highly isolated, areas. In 1966, evidence for an undescribed subspecies of C. angolensis was obtained in Mahale Mountains National Park, central west Tanzania. Mahale C. angolensis has only been observed twice by scientists...
African Primates - Brief Communication. First Photographs of a Living Prigogine's Angola Colobus Colobus angolensis prigoginei.
The global decline of terrestrial species is largely due to the degradation, loss and fragmentation of their habitats. The conversion of natural ecosystems for cropland, rangeland, forest products and human infrastructure are the primary causes of habitat deterioration. Due to the paucity of data on the past distribution of species and the scarcity...
The global decline of terrestrial species is largely due to the degradation, loss and fragmentation of their habitats. The conversion of natural ecosystems for cropland, rangeland, forest products and human infrastructure are the primary causes of habitat deterioration. Due to the paucity of data on the past distribution of species and the scarcity...
This report presents some of the more noteworthy findings for Mahale NP’s primates, addresses their biogeography in the Greater Mahale Ecosystem, explains recent taxonomic changes, and provides information of particularly interest to rangers, guides, and tourists.
73 taxa • 35 distribution maps • 78 illustrations • 13 vocal profiles and a checklist
Illustrations by Stephen D. Nash.
Series Editors Russel A. Mittermeier and Anthony B. Rylands
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...
Illustrations by Stephen D. Nash. 36 taxa, 20 maps, 3 vocal profiles and a checklist
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
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...
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 "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
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...
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
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?
