A sweeping new census published in the journal Environmental Research Letters estimates 52,800 western chimpanzees (Pan troglodytes verus) live in eight countries in western Africa, with most of them found outside of protected areas, some of which are threatened by intense development pressures.
Credit: Kimberley HockingsThe authors used IUCN’s Ape Populations, Environments and Surveys (A.P.E.S.) database, collating 58 survey datasets…
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