'Most endangered' primates list is global

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updated 7:59 a.m. ET April 7, 2005

Below are the 25 primates most threatened by extinction, as reported in a study released on April 7, 2005 by the World Conservation Union, the International Primatological Society and Conservation International:

Greater bamboo lemur (Prolemur simus), Madagascar
White-collared lemur (Eulemur albocollaris), Madagascar
Perrier’s sifaka (Propithecus perrieri), Madagascar
Silky sifaka (Propithecus candidus), Madagascar
Eastern gorilla (Gorilla beringei), Congo, Rwanda, Uganda
Cross River gorilla (Gorilla gorilla diehli), Nigeria, Cameroon
Mt. Rungwe galago (an as yet undescribed form of the genus Galagoides), Tanzania
Tana River red colobus (Procolobus rufomitratus), Kenya
White-naped mangabey (Cercocebus atys lunulatus), Ghana, Ivory Coast
Sanje mangabey (Cercocebus sanjei), Tanzania
Bioko red colobus (Procolobus pennantii pennantii), Equatorial Guinea
Black-faced lion tamarin (Leontopithecus caissara), Brazil
Buffy-headed tufted capuchin (Cebus xanthosternos), Brazil
Northern muriqui (Brachyteles hypoxanthus), Brazil
Brown spider monkey (Ateles hybridus brunneus), Colombia
Horton Plains slender loris (Loris lydekkerianus nycticeboides), Sri Lanka
Miller’s grizzled surili (Presbytis hosei canicrus), Indonesia
Pagai pig-tailed snub-nosed monkey, (Simias concolor), Indonesia
Delacour’s langur (Trachypithecus delacouri), Vietnam
Golden-headed langur (Trachypithecus poliocephalus poliocephalus), Vietnam
Western purple-faced langur (Semnopithecus vetulus nestor), Sri Lanka
Grey-shanked douc (Pygathrix nemaeus cinerea), Vietnam
Tonkin snub-nosed monkey (Rhinopithecus avunculus), Vietnam
Hainan black-crested gibbon, (Nomascus nasutus hainanus), China
Sumatran orangutan (Pongo abelii), Indonesia