Honorary Professor
Psychology Faculty of Natural Sciences, University of Stirling, Stirling, FK9 4LA
I have been affiliated with the University of Stirling since 1983, as a PhD student, an Honorary Research Fellow (1992–2022), and an Honorary Professor since 2022. In the 1980s, I studied the behavioural ecology of western lowland gorillas at Lopé in Gabon. In the 1990s and 2000s, I worked in the forests of Cameroon (Dja), Central African Republic (Bangassou), Democratic Republic of Congo (Kahuzi-Biega), Liberia (Sapo) and Rwanda (Nyungwe and Volcanoes National Parks). I was Director of the Dian Fossey Gorilla Fund’s Karisoke Research Centre in Rwanda for six years, and Chair of the Section on Great Apes (SGA) of the IUCN SSC Primate Specialist Group (PSG) for 10 years. I serve on the Executive Committee of the PSG and am the IUCN Red List Authority Coordinator for all great ape taxa: bonobos, chimpanzees, gorillas and orangutans.
Conservation, ecology and behaviour of gorillas (eastern and western) and other great apes. Areas of particular concern are prevention of disease transmission from humans to great apes, and control of the negative impacts of tourism on great apes. I have edited and produced a number of IUCN publications, including conservation action plans for gorillas, chimpanzees and bonobos (http://www.primate-sg.org/action_plans); and a series of best practice guidelines for great ape conservation (http://www.primate-sg.org/best_practices).
Award for Excellence in Primate Conservation
The fifth biennial Margot Marsh Biodiversity Foundation Award for Excellence in Primate Conservation was given to Liz Williamson in recognition of her achievements in gorilla conservation. The Margot Marsh Biodiversity Foundation was established in the 1990s, and has provided more than $12 million to primate conservation projects worldwide. https://www.grantmakers.io/profiles/v0/330683174-margot-marsh-biodiversity-foundation-co-first-republic-investment-management/
Article
Outcomes of orangutan wild-to-wild translocations reveal conservation and welfare risks
Sherman J, Voigt M, Ancrenaz M, Meijaard E, Oram F, Williamson EA, Russon AE, Seaman DJI, Caurant C, Byler D & Wich SA (2025) Outcomes of orangutan wild-to-wild translocations reveal conservation and welfare risks. PLoS ONE, 20 (3), p. 26, Art. No.: journal.pone.0317862. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0317862; https://doi.org/10.1371/journal.pone.0317862
Book Chapter
Sop T, Cheyne SM, Kühl HS, Maisels F, Wich S & Williamson EA (2025) Annexe sur l'abondance [Estimation de l’abondance des populations de grands singes]. In: La Planète des Grands Singes: Conservation, Santé et Maladies. La Planète des Grands Singes. Cambridge, UK: Arcus Foundation, pp. 1-48. https://www.stateoftheapes.com/la-planete-des-grands-singes/volume-5-conservation-sante-et-maladies
Book Chapter
Ape Population Abundance Estimates
Sop T, Cheyne SM, Kuhl HS, Maisels F, Wich S & Williamson EA (2024) Ape Population Abundance Estimates [Abundance Annex: Ape Population Abundance Estimates]. In: State of the Apes. Cambridge: Cambridge University Press / Arcus foundation. https://www.stateoftheapes.com/volume-5-disease-health-and-ape-conservation/
Article
Williamson EA, Farmer K & Sherman J (2024) Applying best practice to feasibility assessment and strategic planning for great ape translocation: a case study of Grauer's gorilla (Gorilla beringei graueri). Biological Conservation, 292, Art. No.: 110521. https://doi.org/10.1016/j.biocon.2024.110521
Article
Iyer N, Kahlenberg SM, Williamson EA, Kyungu J, Syaluha EK, Mbeke JK, de Merode E & Caillaud D (2023) Viability analysis for population reinforcement of Grauer's gorillas at Mount Tshiaberimu, Democratic Republic of Congo. Journal of Wildlife Management, pp. 1-17, Art. No.: e22384. https://doi.org/10.1002/jwmg.22384
Article
Impact and lessons learned from a half-century of primate conservation action planning
Reuter KE, Mittermeier RA, Williamson EA, Jerusalinsky L, Refisch J, Sunderland-Groves J, Byler D, Konstant WR, Vercillo UE, Schwitzer C & Rylands AB (2022) Impact and lessons learned from a half-century of primate conservation action planning. Diversity, 14 (9), Art. No.: 751. https://doi.org/10.3390/d14090751
Article
Impact of the COVID-19 Pandemic on Primate Research and Conservation
Reuter K, Andriantsaralaza S, Friis Hansen M, LaFleur M, Jerusalinsky L, Louis EE, Ratzimbazafy J, Williamson EA & Mittermeier RA (2022) Impact of the COVID-19 Pandemic on Primate Research and Conservation. Animals, 12 (9), Art. No.: 1214. https://doi.org/10.3390/ani12091214
Article
Expert range maps of global mammal distributions harmonised to three taxonomic authorities
Marsh CJ, Sica YV, Burgin CJ, Dorman WA, Anderson RC, Toro Mijares I, Vigneron JG, Barve V, Dombrowik VL, Duong M, Guralnick R, Hart JA, Maypole JK, Maisels FG & Williamson EA (2022) Expert range maps of global mammal distributions harmonised to three taxonomic authorities. Journal of Biogeography. https://doi.org/10.1111/jbi.14330
Book Chapter
Arcus Foundation (2021) Ape socioecology. In: State of the Apes: Killing, Capture, Trade and Ape Conservation. State of the Apes, 4. Cambridge: Cambridge University Press, pp. xviii-xxxi. https://doi.org/10.1017/9781108768351
Book Chapter
The 25 most endangered primates list: impacts on conservation fundraising and policy
Reuter KE, Mittermeier RA, Schwitzer C, McCabe G, Rylands AB, Jerusalinsky L, Konstant W, Kerhoas D, Ratsimbazafy J, Strier KB, Webber AD, Williamson EA & Wise J (2021) The 25 most endangered primates list: impacts on conservation fundraising and policy. In: Freedman E, Shipley Hiles S & Sachsman DB (eds.) Communicating Endangered Species: Extinction, News and Public Policy. Routledge Studies in Environmental Communication and Media. London: Routledge, pp. 101-115. https://doi.org/10.4324/9781003041955-9
Article
Range-wide indicators of African great ape density distribution
Ordaz‐Németh I, Sop T, Amarasekaran B, Bachmann M, Boesch C, Brncic T, Caillaud D, Campbell G, Carvalho J, Chancellor R, Davenport TRB, Dowd D, Eno‐Nku M, Maisels F & Williamson EA (2021) Range-wide indicators of African great ape density distribution. American Journal of Primatology, 83 (12), Art. No.: e23338. https://doi.org/10.1002/ajp.23338
Article
Carvalho JS, Graham B, Maisels F, Williamson EA, Wich S, Sop T & Kühl HS (2021) Predicting Range Shifts of African Apes and Effectiveness of Protected Areas under Global Change Scenarios. Gorilla Journal: Journal of Berggorilla and Regenwald Direkthilfe, (63), pp. 16-18. https://www.berggorilla.org/en/journal/issues/journal-no-63/article-view/?tx_news_pi1%5Bnews%5D=1122&tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&cHash=2dfbe478198e47c1aee86e0a678e0ccd
Article
Predicting range shifts of African apes under global change scenarios
Carvalho JS, Graham B, Bocksberger G, Maisels F, Williamson EA, Wich S, Sop T, Amarasekaran B, Barca B, Barrie A, Bergl RA, Boesch C, Boesch H, Brncic TM & Morgan BJ (2021) Predicting range shifts of African apes under global change scenarios. Diversity and Distributions, 27 (9), pp. 1663-1679. https://doi.org/10.1111/ddi.13358
Article
Open-access platform to synthesize knowledge of ape conservation across sites
Heinicke S, Ordaz‐Németh I, Junker J, Bachmann ME, Marrocoli S, Wessling EG, Byler D, Cheyne SM, Desmond J, Dowd D, Fitzgerald M, Fourrier M, Goedmakers A, Maisels F & Williamson EA (2021) Open-access platform to synthesize knowledge of ape conservation across sites. American Journal of Primatology, 83 (1), Art. No.: e23213. https://doi.org/10.1002/ajp.23213
Letter
Tapanuli orangutan endangered by Sumatran hydropower scheme
Laurance WF, Wich SA, Onrizal O, Fredriksson G, Usher G, Santika T, Byler D, Mittermeier R, Kormos R, Williamson EA & Meijaard E (2020) Tapanuli orangutan endangered by Sumatran hydropower scheme. Nature Ecology and Evolution, 4 (11), p. 1438–1439. https://doi.org/10.1038/s41559-020-1263-x
Editorial
Primate conservation—new reports from the field
Rylands AB, Mittermeier RA & Williamson EA (2020) Primate conservation—new reports from the field. Oryx, 54 (6), pp. 751-752. https://doi.org/10.1017/s0030605320000939
Article
A Severe Lack of Evidence Limits Effective Conservation of the World's Primates
Junker J, Petrovan SO, Arroyo-RodrÍguez V, Boonratana R, Byler D, Chapman CA, Chetry D, Cheyne SM, Cornejo FM, Cortes-Ortiz L, Cowlishaw G, Christie AP, Crockford C, Torre S & Williamson EA (2020) A Severe Lack of Evidence Limits Effective Conservation of the World's Primates. BioScience, 70 (9), pp. 794-803. https://doi.org/10.1093/biosci/biaa082
Monograph
(2020) Plan d'action régional pour la conservation des chimpanzés d'Afrique de l'Ouest (Pan troglodytes verus) 2020-2030. IUCN SSC Primates Specialist Group (Editor). Gland, Switzerland: IUCN, International Union for Conservation of Nature. https://doi.org/10.2305/iucn.ch.2020.ssc-rap.2.fr
Monograph
Regional action plan for the conservation of western chimpanzees (Pan troglodytes verus) 2020–2030
(2020) Regional action plan for the conservation of western chimpanzees (Pan troglodytes verus) 2020–2030. IUCN SSC Primate Specialist Group (Editor). Gland, Switzerland: IUCN, International Union for Conservation of Nature. https://doi.org/10.2305/iucn.ch.2020.ssc-rap.2.en
Article
Towards systematic and evidence-based conservation planning for western chimpanzees
Heinicke S, Mundry R, Boesch C, Hockings KJ, Kormos R, Ndiaye PI, Tweh CG, Williamson EA & Kühl HS (2019) Towards systematic and evidence-based conservation planning for western chimpanzees. American Journal of Primatology, 81 (9), Art. No.: e23042. https://doi.org/10.1002/ajp.23042
Article
Heinicke S, Mundry R, Boesch C, Amarasekaran B, Barrie A, Brncic T, Brugiere D, Campbell G, Carvalho J, Danquah E, Dowd D, Eshuis H, Fleury-Brugiere M, Maisels F & Williamson EA (2019) Advancing conservation planning for western chimpanzees using IUCN SSC A.P.E.S.-the case of a taxon-specific database. Environmental Research Letters, 14 (6), Art. No.: 064001. https://doi.org/10.1088/1748-9326/ab1379
Article
A Poaching Categorization Scheme
Williamson L (2018) A Poaching Categorization Scheme. Gorilla Journal, (57), pp. 20-21. https://www.berggorilla.org/en/journal/issues/journal-no-57/article-view/a-poaching-categorization-scheme/
Article
Estrada A, Garber PA, Mittermeier RA, Wich S, Gouveia S, Dobrovolski R, Nekaris KAI, Nijman V, Rylands AB, Maisels F, Williamson EA, Bicca-Marques J, Fuentes A, Jerusalinsky L & Johnson S (2018) Primates in peril: the significance of Brazil, Madagascar, Indonesia and the Democratic Republic of the Congo for global primate conservation. PeerJ, 6, Art. No.: e4869. https://doi.org/10.7717/peerj.4869
Book Review
International Encyclopedia of Primatology
Feistner ATC, Askew JA, Hyde Roberts S, Radford L & Williamson EA (2018) International Encyclopedia of Primatology. Folia Primatologica, 89 (3-4), p. 251–257. https://www.karger.com/Article/Abstract/485442; https://doi.org/10.1159/000485442
Article
Strindberg S, Maisels F, Williamson EA, Blake S, Stokes EJ, Aba'a R, Abitsi G, Agbor A, Ambahe RD, Bakabana PC, Bechem M, Berlemont A, de Semboli B, Boundja PR & Jeffery KJ (2018) Guns, germs, and trees determine density and distribution of gorillas and chimpanzees in Western Equatorial Africa. Science Advances, 4 (4), Art. No.: eaar2964. https://doi.org/10.1126/sciadv.aar2964
Technical Report
Ondoua Ondoua G, Beodo Moundjim E, Mambo Marindo JC, Jiagho R, Usongo L & Williamson EA (2017) An Assessment of Poaching and Wildlife Trafficking in the Garamba-Bili-Chinko Transboundary Landscape. TRAFFIC Report. TRAFFIC. http://www.traffic.org/publications/an-assessment-of-poaching-and-wildlife-trafficking-in-the-ga.html
Article
The Critically Endangered western chimpanzee declines by 80%
Kuehl H, Sop T, Williamson EA, Mundry R, Brugiere D, Campbell G, Cohen H, Danquah E, Ginn L, Herbinger I, Jones S, Junker J, Kormos R, Kouakou CY & N'Goran PK (2017) The Critically Endangered western chimpanzee declines by 80%. American Journal of Primatology, 79 (9), Art. No.: e22681. https://doi.org/10.1002/ajp.22681
Website Content
Pan troglodytes (errata version published in 2018)
Humle T, Maisels F, Oates JF, Plumptre A & Williamson EA (2016) Pan troglodytes (errata version published in 2018). The IUCN Red List of Threatened Species [IUCN website] 2016. https://doi.org/10.2305/IUCN.UK.2016-2.RLTS.T15933A17964454.en
Website Content
Maisels F, Bergl R & Williamson EA (2016) Gorilla gorilla. IUCN Red List [IUCN Red List Assessment web page] 2016. http://www.iucnredlist.org/details/9404/0
Article
Plumptre A, Nixon S, Kujirakwinja D, Vieilledent G, Critchlow R, Williamson EA, Nishuli R, Kirkby A & Hall JS (2016) Catastrophic decline of world's largest primate: 80% loss of Grauer's gorilla (Gorilla beringei graueri) population justifies Critically Endangered status. PLoS ONE, 11 (10), Art. No.: e0162697. http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0162697; https://doi.org/10.1371/journal.pone.0162697
Research Report
Gilardi KV, Gillespie TR, Leendertz FH, Macfie EJ, Travis DA, Whittier CA & Williamson EA (2016) Lignes directrices pour de meilleures pratiques en matière de suivi de la santé et de contrôle des maladies des populations de grands singes. Williamson E (Editor). International Union for Conservation of Nature and Natural Resources. http://www.primate-sg.org/best_practice_disease
Technical Report
Panduan Pengawasan Kesehatan dan Pengendalian Penyakit pada Populasi Kera Besar
Gilardi KV, Gillespie TR, Leendertz FH, Macfie EJ, Travis DA, Whittier CA & Williamson EA (2016) Panduan Pengawasan Kesehatan dan Pengendalian Penyakit pada Populasi Kera Besar. International Union for Conservation of Nature and Natural Resources. http://www.primate-sg.org/best_practice_disease
Website Content
Pan paniscus (errata version published in 2016)
Fruth B, Hickey JR, Andre C, Furuichi T, Hart J, Hart T, Kuehl H, Maisels F, Nackoney J, Reinartz G, Sop T, Thompson J & Williamson EA (2016) Pan paniscus (errata version published in 2016). IUCN Red List [IUCN Red List Assessment web page] 24.03.2016. https://doi.org/10.2305/IUCN.UK.2016-2.RLTS.T15932A17964305.en
Authored Book
Best Practice Guidelines for Health Monitoring and Disease Control in Great Ape Populations
Gilardi KV, Gillespie TR, Leendertz FH, Macfie EJ, Travis DA, Whittier CA & Williamson EA (2015) Best Practice Guidelines for Health Monitoring and Disease Control in Great Ape Populations. Occasional Paper of the IUCN Species Survival Commission, 56. Gland, Switzerland: IUCN SSC Primate Specialist Group. https://portals.iucn.org/library/node/45793
Book Chapter
Ancrenaz M, Cheyne SM, Humle T, Rawson BM, Robbins MM & Williamson EA (2015) Ape socioecology. In: Arcus Foundation (ed.) State of the Apes: Industrial Agriculture and Ape Conservation. Cambridge, UK: Cambridge University Press, pp. xv-xxv. http://www.stateoftheapes.com
Book Chapter
Ape Population Abundance Estimates
Sop T, Cheyne SM, Maisels F, Wich SA & Williamson EA (2015) Ape Population Abundance Estimates. In: Arcus Foundation (ed.) Industrial Agriculture and Ape Conservation: State of the Apes 2015. State of the Apes. Cambridge: Cambridge University Press, pp. 1-41. http://www.stateoftheapes.com/volume-2-industrial-agriculture/
Technical Report
Plumptre AJ, Nixon S, Critchlow R, Vieilledent G, Nishuli R, Kirkby A, Williamson EA, Hall JS & Kujirakwinja D (2015) Status of Grauer’s Gorilla and Chimpanzees in Eastern Democratic Republic of Congo: Historical and Current Distribution and Abundance. Arcus Foundation. Wildlife Conservation Society, Fauna & Flora International and Institut Congolais pour la Conservation de la Nature, New York. http://fscdn.wcs.org/2016/04/04/inbumeq9_Status_of_Grauers_gorilla_and_eastern_chimpanzee_Report_Final.pdf
Edited Book
Primates in Peril: The World’s 25 Most Endangered Primates 2014–2016
Schwitzer C, Mittermeier RA, Rylands AB, Chiozza F, Williamson EA, Wallis J & Cotton A (eds.) (2015) Primates in Peril: The World’s 25 Most Endangered Primates 2014–2016. Arlington, VA: IUCN SSC Primate Specialist Group, International Primatological Society, Conservation International and Bristol Zoological Society. http://www.primate-sg.org/special_reports
Article
Apes in the Anthropocene: flexibility and survival
Hockings KJ, McLennan MR, Carvalho S, Ancrenaz M, Bobe R, Byrne RW, Dunbar RIM, Matsuzawa T, McGrew WC, Williamson EA, Wilson ML, Wood B, Wrangham RW & Hill CM (2015) Apes in the Anthropocene: flexibility and survival. Trends in Ecology and Evolution, 30, pp. 215-222. https://doi.org/10.1016/j.tree.2015.02.002
Book Chapter
Biodiversity Conservation and Management
Marechal C, Cawoy V, Cocquyt C, Dauby G, Dessein S, Douglas-Hamilton I, Dupain J, Fischer E, Fouth Obang D, Groom Q, Henschel P, Jeffery KJ, Korte L, Lewis SL, Luhunu S, Maisels F & Williamson EA (2014) Biodiversity Conservation and Management. In: de Wasseige C, Flynn J, Louppe D, Hiol HF & Mayaux P (eds.) The Forests of the Congo Basin - State of the Forest 2013. State of the Forest. Neufchateau, Belgium: Weyrich Edition, pp. 67-96. http://www.observatoire-comifac.net/edf2013.php?l=en
Book Chapter
Impacts écologiques des activités d’extraction sur la population de grands singes
Williamson EA, Rawson BM, Cheyne SM, Meijaard E & Wich SA (2014) Impacts écologiques des activités d’extraction sur la population de grands singes. In: Fondation A (ed.) La planète des grands singes 2013. Industries extractives et conservation des grands singes. La planète des grands singes, 1. Cambridge: Arcus Foundation, pp. 76-119.
Book Chapter
Situation des grands singes en Afrique et en Asie
Funwi-Gabga N, Kuehl H, Maisels F, Cheyne SM, Wich SA & Williamson EA (2014) Situation des grands singes en Afrique et en Asie. In: Fondation A (ed.) La planète des grands singes 2013: Industries extractives et conservation des grands singes. La planète des grands singes, 1. Cambridge: Arcus Foundation, p. 299–327. http://www.stateoftheapes.com/wp-content/uploads/2015/02/SOTA_French.pdf
Book Chapter
Conservation et gestion de la biodiversité
Marechal C, Cawoy V, Cocquyt C, Dauby G, Dessein S, Douglas-Hamilton I, Dupain J, Fischer E, Fouth Obang D, Groom Q, Henschel P, Jeffery KJ, Korte L, Lewis SL, Luhunu S, Maisels F, Melletti M, Ngoufo R, Ntore S, Palla F, Scholte P, Sonke B, Stevart T, Stoffelen P, van den Broeck D, Walters G & Williamson EA (2014) Conservation et gestion de la biodiversité. In: de Wasseige C, Flynn J, Louppe D, Hiol HF & Mayaux P (eds.) Les forêts du bassin du Congo État des Forêts 2013. State of the Forest. Neufchâteau, Belgium: Weyrich Édition, p. 67–96. http://www.observatoire-comifac.net/edf2013.php?l=fr
Book Chapter
Mountain gorillas: a shifting demographic landscape
Williamson EA (2014) Mountain gorillas: a shifting demographic landscape. In: Yamagiwa J & Karczmarski L (eds.) Primates and Cetaceans: Field Research and Conservation of Complex Mammalian Societies. Primatology Monographs, 5. Tokyo: Springer Japan, pp. 273-287. http://link.springer.com/book/10.1007/978-4-431-54523-1
Conference Paper (published)
Massive loss of forests elephants in central Africa
Maisels F, Strindberg S, Blake S, Wittemyer G, Hart J, Williamson EA, Aba'a R, Abitsi G, Ambahe R, Amsini F, Bakabana PC, Hicks T, Bayogo R, Bechem M & Beyers R (2014) Massive loss of forests elephants in central Africa. In: Malhi Y (ed.) Megafauna and Ecosystem Function: from the Pleistocene to the Anthropocene Conference Abstracts. Megafauna and Ecosystem Function: From the Pleistocene to the Anthropocene, Oxford University, Oxford, UK, 18.03.2014-20.03.2014. Oxford: Environmental change institute, Oxford University, p. 18. http://oxfordmegafauna.weebly.com/uploads/1/8/7/6/18767612/abstracts_megafauna_ecosystem_function.pdf
Edited Book
Maisels F & Williamson EA (eds.) (2014) Regional Action Plan for the Conservation of Western Lowland Gorillas and Central Chimpanzees 2015–2020. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources. https://portals.iucn.org/library/node/45060; https://doi.org/10.2305/IUCN.CH.2005.SSC-RAP.1.en
Article
Great apes and biodiversity offset projects in Africa: the case for national offset strategies
Kormos R, Kormos C, Humle T, Lanjouw A, Rainer H, Victurine R, Mittermeier RA, Diallo MS, Rylands AB & Williamson EA (2014) Great apes and biodiversity offset projects in Africa: the case for national offset strategies. PLoS ONE, 9 (11), Art. No.: e111671. https://doi.org/10.1371/journal.pone.0111671
Book Chapter
Guidelines for best practice in great ape tourism
Williamson EA & Macfie EJ (2014) Guidelines for best practice in great ape tourism. In: Russon A & Wallis J (eds.) Primate Tourism: A Tool for Conservation?. Cambridge: Cambridge University Press, pp. 292-310. http://www.cambridge.org/gb/academic/subjects/life-sciences/biological-anthropology-and-primatology/primate-tourism-tool-conservation?
Book Chapter
The status of apes across Africa and Asia
Funwi-Gabga N, Kuehl H, Maisels F, Cheyne SM, Wich SA & Williamson EA (2014) The status of apes across Africa and Asia. In: State of the Apes 2013: Extractive Industries and Ape Conservation. Book authored by the Arcus Foundation, State of the Apes series. Cambridge: Cambridge University Press, p. 252–277. http://www.cambridge.org/gb/academic/subjects/life-sciences/biological-anthropology-and-primatology/extractive-industries-and-ape-conservation?format=HB
Article
Devastating decline of forest elephants in Central Africa
Maisels F, Strindberg S, Blake S, Wittemyer G, Hart J, Williamson EA, Aba'a R, Abitsi G, Ambahe R, Amsini F, Bakabana PC, Hicks T, Bayogo R, Bechem M & Morgan BJ (2014) Devastating decline of forest elephants in Central Africa. PLoS ONE, 8 (3), Art. No.: e59469. https://doi.org/10.1371/journal.pone.0059469
Technical Report
Dunn A, Bergl R, Byler D, Eben-Ebai S, Etiendem DN, Fotso R, Ikfuingei R, Imong I, Jameson C, Macfie EJ, Morgan BJ, Nchanji A, Nicholas A, Nkembi L, Omeni F, Oates JF, Pokempner A, Sawyer S & Williamson EA (2014) Revised Regional Action Plan for the Conservation of the Cross River Gorilla (Gorilla gorilla diehli) 2014–2019. International Union for Conservation of Nature. IUCN/SSC Primate Specialist Group and Wildlife Conservation Society. http://www.primate-sg.org/action_plans/
Book Chapter
Ecological impacts of extractive industries on ape populations
Williamson EA, Rawson BM, Cheyne SM, Meijaard E & Wich SA (2014) Ecological impacts of extractive industries on ape populations. In: State of the Apes 2013: Extractive Industries and Ape Conservation. Book authored by the Arcus Foundation, State of the Apes series. Cambridge: Cambridge University Press, pp. 65-99. http://www.cambridge.org/gb/academic/subjects/life-sciences/biological-anthropology-and-primatology/extractive-industries-and-ape-conservation?format=HB
Article
Obituary: Dr. Annie Gautier-Hion (1940–2011)
Gautier J, Caillaud D, Oates JF, Struhsaker T & Williamson L (2013) Obituary: Dr. Annie Gautier-Hion (1940–2011). Primate Conservation, 26 (1), pp. 145-145. https://doi.org/10.1896/052.026.0101
Technical Report
Morgan D, Sanz C, Greer D, Rayden T, Maisels F & Williamson EA (2013) Les grands singes et le FSC: Mise en oeuvre de pratiques d’exploitation favorables aux grands singes dans les concessions forestières en Afrique centrale. International Union for Conservation of Nature. Document occasionnel de la Commission de la sauvegarde des espèces de l’UICN, 49. Groupe de spécialistes des primates CSE/UICN. www.primate-sg.org/best_practice_logging/.
Authored Book
Great apes and FSC: Implementing 'ape friendly' practices in Central Africa's logging concessions
Morgan D, Sanz C, Greer D, Rayden T, Maisels F & Williamson EA (2013) Great apes and FSC: Implementing 'ape friendly' practices in Central Africa's logging concessions [Les grands singes et le FSC: Mise en œuvre de pratiques d’exploitation favorables aux grands singes dans les concessions forestières en Afrique centrale]. Occasional Paper of the IUCN Species Survival Commission, 49. Gland, Switzerland: IUCN/SSC Primate Specialist Group. http://www.primate-sg.org/best_practice_logging/
Book Chapter
Eastern Gorilla Gorilla beringei
Williamson EA & Richardson M (2013) Eastern Gorilla Gorilla beringei. In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 849–850. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Western Gorilla Gorilla gorilla
Williamson EA & Richardson M (2013) Western Gorilla Gorilla gorilla. In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 848–849. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Humle T, Williamson EA & Richardson M (2013) Chimpanzee Pan troglodytes. In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 852–853. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Sumatran Orangutan Pongo abelii
Morton FB, Williamson EA & Singleton I (2013) Sumatran Orangutan Pongo abelii. In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 845–846. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Fruth B, Williamson EA & Richardson M (2013) Bonobo Pan paniscus. In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 853–854. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Bornean Orangutan Pongo pygmaeus
Morton FB, Williamson EA & Russon A (2013) Bornean Orangutan Pongo pygmaeus. In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 844–845. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Williamson EA, Maisels F, Groves C, Fruth B, Humle T, Morton FB, Richardson M, Russon A & Singleton I (2013) Family Hominidae (Great Apes). In: Mittermeier R, Rylands A & Wilson D (eds.) Handbook of the Mammals of the World Volume 3: Primates. Barcelona: Lynx Edicions, p. 792–843. http://www.lynxeds.com/hmw/handbook-mammals-world-volume-3
Book Chapter
Gorilla gorilla Western Gorilla
Williamson EA & Butynski TM (2013) Gorilla gorilla Western Gorilla. In: Butynski T, Kingdon J & Kalina J (eds.) Mammals of Africa. Volume II: Primates. Mammals of Africa, 2. London: Bloomsbury Publishing, p. 39–45. http://www.bloomsbury.com/uk/mammals-of-africa-9781408122570/
Book Chapter
Gorilla beringei Eastern Gorilla
Williamson EA & Butynski TM (2013) Gorilla beringei Eastern Gorilla. In: Butynski T, Kingdon J & Kalina J (eds.) Mammals of Africa. Volume II: Primates. Mammals of Africa, 2. London: Bloomsbury Publishing, p. 45–53. http://www.bloomsbury.com/uk/mammals-of-africa-9781408122570/
Technical Report
Maldonado O, Aveling C, Cox D, Nixon S, Nishuli R, Merlo D, Pintea L & Williamson EA (2012) Grauer’s Gorillas and Chimpanzees in Eastern Democratic Republic of Congo (Kahuzi-Biega, Maiko, Tayna and Itombwe Landscape): Conservation Action Plan 2012–2022. International Union for Conservation of Nature. International Union for Conservation of Nature and Natural Resources. http://www.primate-sg.org/storage/pdf/Eastern_DRC_CAP.pdf
Technical Report
Maldonado O, Aveling C, Cox D, Nixon S, Nishuli R, Merlo D, Pintea L & Williamson EA (2012) Gorilles de Grauer et Chimpanzés de l’Est de la République Démocratique du Congo (Paysage de Kahuzi-Biega, Maiko, Tayna et Itombwe) Plan d’action pour la conservation 2012-2022 [Grauer’s Gorillas and Chimpanzees in Eastern Democratic Republic of Congo (Kahuzi-Biega, Maiko, Tayna and Itombwe Landscape): Conservation Action Plan 2012–2022]. International Union for Conservation of Nature. International Union for Conservation of Nature and Natural Resources. http://www.primate-sg.org/storage/pdf/Eastern_RDC_CAP.pdf
Edited Book
IUCN & ICCN (authors), 'Bonobo (Pan paniscus): Conservation Strategy 2012–2022'
Aveling C, Cipolletta C, Maisels F & Williamson EA (eds.) (2012) IUCN & ICCN (authors), 'Bonobo (Pan paniscus): Conservation Strategy 2012–2022' [Bonobo (Pan paniscus) : stratégie de conservation 2012–2022]. IUCN/SSC Action Plans for the Conservation of Biological Diversity. Gland, Switzerland: IUCN/SSC Primate Specialist Group & Institut Congolais pour la Conservation de la Nature. http://data.iucn.org/dbtw-wpd/edocs/2012-083.pdf
Article
Recent decline in suitable environmental conditions for African great apes
Junker J, Blake S, Boesch C, Campbell G, du Toit L, Duvall C, Ekobo A, Etoga G, Galat-Luong A, Gamys J, Ganas-Swaray J, Gatti S, Ghiurghi A, Granier N, Hart J, Herbinger I, Hicks T, Imong I, Kuempel N, Lahm SA, Maisels F, Morgan BJ, Mulindahabi F, Mundry R, Normand E, Tiku Okon D, Plumptre AJ, Rainey H, Stokes E, Tranquilli S, Sunderland-Groves J, Walsh P, Warren Y, Williamson EA & Kuehl H (2012) Recent decline in suitable environmental conditions for African great apes. Diversity and Distributions, 18 (11), pp. 1077-1091. https://doi.org/10.1111/ddi.12005
Conference Paper (unpublished)
Morgan BJ, Dunn A, Gonder MK, Kormos R, Maisels F, Nicholas A, Sunderland-Groves J & Williamson EA (2012) Do primate action plans work?. International Primatological Society XXIV Congress Mexico 2012: Primatology's Legacy and Future Challenges, Cancun, Mexico, 12.08.2012-17.08.2012.
Technical Report
Morgan BJ, Adeleke A, Bassey T, Bergl R, Dunn A, Fotso R, Gadsby E, Gonder MK, Greengrass E, Koulagna DK, Mbah G, Nicholas A, Oates JF, Omeni F, Saidu Y, Sommer V, Sunderland-Groves J, Tiebou J & Williamson EA (2011) Regional Action Plan for the Conservation of the Nigeria–Cameroon Chimpanzee (Pan troglodytes ellioti). IUCN/SSC Primate Specialist Group and Zoological Society of San Diego. http://www.primate-sg.org/storage/pdf/NCCAP.pdf
Book Chapter
Habituating primates: Processes, techniques, variables and ethics (2nd Edition)
Williamson EA & Feistner A (2011) Habituating primates: Processes, techniques, variables and ethics (2nd Edition). In: Setchell J & Curtis D (eds.) Field and Laboratory Methods in Primatology: A Practical Guide. 2nd ed. Cambridge: Cambridge University Press, pp. 33-50. http://www3.cambridge.org/asia/catalogue/catalogue.asp?isbn=9780521194099
Article
The Impact of Conservation on the Status of the World's Vertebrates
Hoffmann M, Hilton-Taylor C, Angulo A, Böhm M, Brooks TM, Butchart SHM, Carpenter KE, Chanson JS, Collen B, Cox NA, Darwall WRT, Dulvy NK, Harrison LR, Katariya V, Pollock CM, Quader S, Richman NI, Rodrigues ASL, Tognelli MF, Vie J & Williamson EA (2010) The Impact of Conservation on the Status of the World's Vertebrates. Science, 330 (6010), pp. 1503-1509. https://doi.org/10.1126/science.1194442
Technical Report
Best Practice Guidelines for Great Ape Tourism
Macfie EJ & Williamson EA (2010) Best Practice Guidelines for Great Ape Tourism [Lignes directrices pour de meilleures pratiques en matière de tourisme de vision des grands singes; Panduan Wisata Kera Besar]. Williamson E (Editor) U.S. Fish and Wildlife Service. Occasional Paper of the IUCN Species Survival Commission, 38. Gland, Switzerland: IUCN. http://www.primate-sg.org/best.practices.htm
Technical Report
Plumptre AJ, Williamson EA, Rose R, Nangendo G, Didier K, Hart J & Mulindahabi F (2010) Eastern Chimpanzee (Pan troglodytes schweinfurthii): Status Survey and Conservation Action Plan 2010-2020. Gland, Switzerland: IUCN. http://www.iucn.org/knowledge/publications_doc/publications/?5481/East-African-chimpanzee-Pan-troglodytes-schweinfurthii--status-survey-and-conservation-action-plan-2010-2020
Article
Primates in Peril: The world's 25 most endangered primates 2008-2010
Mittermeier RA, Wallis J, Rylands AB, Ganzhorn JU, Oates JF, Williamson EA, Palacios E, Heymann EW, Kierulff MCM, Yongcheng L, Supriatna J, Roos C, Walker S, Cortes-Ortiz L & Schwitzer C (2009) Primates in Peril: The world's 25 most endangered primates 2008-2010. Primate Conservation, 24, pp. 1-57. http://www.primate-sg.org/T25full07.htm
Article
List of Plant species of the Lopé Reserve, Gabon, with emphasis on the northern half
White L, McPherson G, Tutin CEG, Williamson EA, Abernethy K, Reitsma JM, Wieringa JJ, Blom A & Harrison MJS (2009) List of Plant species of the Lopé Reserve, Gabon, with emphasis on the northern half. Annals of the Missouri Botanical Garden, 96.
Book Chapter
Le gorille oriental (Gorilla beringei)
Ferriss S, Robbins MM & Williamson EA (2009) Le gorille oriental (Gorilla beringei). In: Caldecott J & Miles L (eds.) Atlas mondial des grands singes et de leur conservation. UNESCO, pp. 141-167. http://publishing.unesco.org/details.aspx?Code_Livre=4726
Research Report
Kuhl H, Maisels F, Ancrenaz M & Williamson EA (2009) Lignes directrices pour de meilleures pratiques en matiere d’inventaire et de suivi des populations de grands singes [Best Practice Guidelines for Surveys and Monitoring of Great Ape Populations]. Document occasionnel de la Commission de la sauvegarde des espèces de l'UICN, 36. Gland, Switzerland.: Groupe de spécialistes des primates de la CSE de l’UICN. http://www.primate-sg.org/storage/pdf/BP.surveys.fr.pdf
Edited Book
Williamson EA (ed.) (2009) Best Practice Guidelines for the Prevention and Mitigation of Conflict Between Humans and Great Apes, by Kimberley Hockings and Tatyana Humle. Occasional Paper of the IUCN Species Survival Commission, 37. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources. https://portals.iucn.org/library/node/9324
Website Content
Gorilla beringei ssp. beringei
Robbins MM, Gray M, Kuempel N, Lanjouw A, Maisels F, Mugisha A, Spelman L & Williamson EA (2008) Gorilla beringei ssp. beringei. IUCN Red List [IUCN Red List Assessment web page] 2008. http://www.iucnredlist.org/apps/redlist/details/39999/0
Conference Abstract
Pintea L, Kuehl H, Laporte N, Maisels F & Williamson EA (2008) The Great Apes Mapper: developing an online global geo-database and visualization tool for monitoring great ape populations. 22nd Congress of the International Primatatological Society, 2008, Edinburgh, Uk, 03/08/2008 - 08/08/2008. Primate Eye, 96, p. 314. http://ips.conference-services.net/programme.asp?conferenceID=1080&action=prog_presenters
Website Content
Gorilla beringei ssp. graueri (errata version published in 2016).
Robbins MM, Hart J, Maisels F, Mehlman P, Nixon S & Williamson EA (2008) Gorilla beringei ssp. graueri (errata version published in 2016).. The IUCN Red List of Threatened Species [IUCN website] 2008. https://doi.org/10.2305/IUCN.UK.2016-2.RLTS.T39995A17989838.en
Authored Book
Best Practice Guidelines for Surveys and Monitoring of Great Ape Populations
Kuhl H, Maisels F, Ancrenaz M & Williamson EA (2008) Best Practice Guidelines for Surveys and Monitoring of Great Ape Populations [Lignes directrices pour de meilleures pratiques en matière d’inventaire et de suivi des populations de grands singes]. Occasional Paper of the IUCN Species Survival Commission, 36. Gland, Switzerland: IUCN/SSC Primate Specialist Group. http://www.primate-sg.org/BP.surveys.htm
Book Chapter
Long-term research and conservation of the Virunga mountain gorillas
Williamson EA & Fawcett K (2008) Long-term research and conservation of the Virunga mountain gorillas. In: Wrangham R & Ross E (eds.) Science and Conservation in African Forests: The Benefits of Longterm Research. Cambridge, UK: Cambridge University Press, pp. 213-229. http://ebooks.cambridge.org/chapter.jsf?bid=CBO9780511754920&cid=CBO9780511754920A027
Article
The status of the world's land and marine mammals: diversity, threat, and knowledge
Schipper J, Chanson JS, Chiozza F, Cox NA, Hoffmann M, Katariya V, Lamoreux J, Rodrigues ASL, Stuart SN, Temple HJ, Baillie J, Boitani L, Lacher Jr TE, Mittermeier RA, Smith AT & Williamson EA (2008) The status of the world's land and marine mammals: diversity, threat, and knowledge. Science, 322 (5899), pp. 225-230. https://doi.org/10.1126/science.1165115
Article
Primate surveys and conservation assessments
Rylands AB, Williamson EA, Hoffmann M & Mittermeier RA (2008) Primate surveys and conservation assessments. Oryx, 42 (3), pp. 313-314. https://doi.org/10.1017/S0030605308423050
Conference Paper (published)
Report on IUCN, SSC and PSG actions: a summary of activities 2004-2006
Mittermeier RA, Rylands AB & Williamson EA (2008) Report on IUCN, SSC and PSG actions: a summary of activities 2004-2006. In: volume 29. XXI Congress of the International Primatological Society, Entebbe, Uganda, 25.06.2006-30.06.2006. BMC, p. 273–287. https://doi.org/10.1007/s10764-007-9153-5
Article
Primates in peril: The world's 25 most endangered primates, 2006-2008
Mittermeier RA, Ratsimbazafy J, Rylands AB, Williamson EA, Oates JF, Mbora D, Ganzhorn JU, Rodriguez-Luna E, Palacios E, Heymann EW, Kierulff MCM, Yongcheng L, Supriatna J, Roos C, Walker S & Aguiar JM (2007) Primates in peril: The world's 25 most endangered primates, 2006-2008. Primate Conservation, 22, pp. 1-40. http://www.primate-sg.org/T25full07.htm
Technical Report
Regional Action Plan for the Conservation of the Cross River Gorilla (Gorilla gorilla diehli)
Oates JF, Sunderland-Groves J, Bergl R, Dunn A, Nicholas A, Takang E, Omeni F, Imong I, Fotso R, Nkembi L & Williamson EA (2007) Regional Action Plan for the Conservation of the Cross River Gorilla (Gorilla gorilla diehli). Oates JF (Editor), Sunderland-Groves J (Editor), Bergl R (Editor), Dunn Andrew A (Editor), Nicholas A (Editor), Takang E (Editor), Omeni F (Editor), Imong I (Editor), Fotso R (Editor), Nkembi L (Editor) & Williamson L (Editor). Arlington, VA, USA: IUCN/SSC Primate Specialist Group and Conservation International. http://www.primate-sg.org/gapubs.htm
Edited Book
Williamson EA (ed.) (2007) Best Practice Guidelines for Reducing the Impact of Commercial Logging on Great Apes in Western Equatorial Africa, by David Morgan and Crickette Sanz. Occasional Paper of the IUCN Species Survival Commission, 034. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources. https://portals.iucn.org/library/node/9059
Edited Book
Williamson EA (ed.) (2007) Best Practice Guidelines for the Re-introduction of Great Apes, by Benjamin B Beck, Michelle Rodrigues, Tara Stoinski, Dominic A Travis, Steve Unwin, and Kristina Walkup. Occasional Paper of the IUCN Species Survival Commission, 035. Gland, Switzerland: International Union for Conservation of Nature and Natural Resources. https://portals.iucn.org/library/node/9065
Article
Forest elephant crisis in the Congo Basin
Blake S, Strindberg S, Boudjan P, Makombo C, Inogwabini B, Ilambu O, Grossmann F, Bene-Bene L, de Semboli B, Mbenzo V, S'hwa D, Bayogo R, Williamson EA, Fay M, Hart J & Maisels F (2007) Forest elephant crisis in the Congo Basin. PLoS Biology, 5 (4), p. e111. http://biology.plosjournals.org/; https://doi.org/10.1371/journal.pbio.0050111
Article
Williamson EA (2005) In her footsteps [Dian Fossey 1932-1985]. International Primate Protection League News, 32 (3), pp. 6-7. http://www.ippl.org/gibbon/current-news/newsletters-2000s/
Conference Paper (unpublished)
Regional surveys map the forest elephant crisis in Central Africa
Blake S, Maisels F, Ilambu O, Bokoto B, Makombo C, Boudjan P, Bene-Bene L, Williamson EA & Bayogo R (2005) Regional surveys map the forest elephant crisis in Central Africa. Society for Conservation Biology, Annual Conference 2005, Brasilia, Brazil, 15.07.2005-19.07.2005. https://conbio.org/images/content_conferences/2005abstract.pdf
Book Chapter
Eastern gorilla (Gorilla beringei)
Ferriss S, Robbins MM & Williamson EA (2005) Eastern gorilla (Gorilla beringei). In: Caldecott J & Miles L (eds.) World Atlas of Great Apes and their Conservation. Berkeley, Los Angeles, London: University of California Press, California/UNEP World Conservation Monitoring Centre, pp. 129-152. http://www.unep-wcmc.org/resources/publications/WAGAC/launch.htm
Article
Mountain gorilla tug-of-war: Silverbacks have limited control over reproduction in multimale groups
Bradley BJ, Robbins MM, Williamson EA, Steklis HD, Gerald-Steklis N, Eckhardt N, Boesch C & Vigilant L (2005) Mountain gorilla tug-of-war: Silverbacks have limited control over reproduction in multimale groups. Proceedings of the National Academy of Sciences, 102 (26), pp. 9418-9423. https://doi.org/10.1073/pnas.0502019102
Article
"Snare aware" mountain gorillas
Williamson EA (2005) "Snare aware" mountain gorillas. Gorilla Gazette, 18 (1), p. 8. http://www.gorillagazette.com/past.htm
Article
Transport of dead infant mountain gorillas by mothers and unrelated females
Warren Y & Williamson EA (2004) Transport of dead infant mountain gorillas by mothers and unrelated females. Zoo Biology, 23 (4), pp. 375-378. https://doi.org/10.1002/zoo.20001
Book Chapter
Habituating primates: Processes, techniques, variables and ethics
Williamson EA & Feistner A (2003) Habituating primates: Processes, techniques, variables and ethics. In: Setchell JM & Curtis DJ (eds.) Field and Laboratory Methods in Primatology: A Practical Guide. Cambridge: Cambridge University Press, pp. 25-39. http://www.cambridge.org/us/catalogue/catalogue.asp?isbn=9780521526289
Article
Hall JS, White L, Williamson EA, Inogwabini B & Ilambu O (2003) Distribution, Abundance, and Biomass Estimates for Primates within Kahuzi-Biega Lowlands and Adjacent Forest in Eastern DRC. African Primates, 6 (1&2), pp. 35-42. http://www.primate-sg.org/ap.htm
