The World's 25 Most Endangered Primates, and the countries where they are found:
1. Greater bamboo lemur (Prolemur simus), Madagascar
2. White-collared lemur (Eulemur albocollaris), Madagascar
3. Sahamalaza Peninsula sportive lemur (Lepilemur sahamalazensis), Madagascar
4. Silky sifaka (Propithecus candidus), Madagascar
5. Cross River gorilla (Gorilla gorilla diehli), Nigeria, Cameroon
6. Roloway monkey (Cercopithecus diana roloway), Ivory Coast, Ghana
7. Rondo dwarf galago (Galagoides rondoensis), Tanzania
8. Tana River red colobus (Procolobus rufomitratus), Kenya
9. Miss Waldron's red colobus (Procolobus badius), Ivory Coast, Ghana
10. Kipunji (Rungwecebus kipunji), Tanzania
11. Pennant's red colobus (Procolobus pennantii pennantii), Equatorial Guinea (Island of Bioko)
12. Variegated spider monkey (Ateles hybridus), Colombia, Venezuela
13. Brown-headed spider monkey (Ateles fusciceps), Colombia, Ecuador
14. Peruvian yellow-tailed woolly monkey (Oreonax flavicauda), Peru
15. Western Hoolock gibbon (Hoolock hoolock), Bangladesh, India, Myanmar
16. Horton Plains slender loris (Loris tardigradus nycticeboides), Sri Lanka
17. Western purple-faced langur (Semnopithecus vetulus nestor), Sri Lanka
18. Pig-tailed langur (Simias concolor), Indonesia (Mentawai Islands)
19. Siau Island tarsier (Tarsius sp.), Indonesia
20. Delacour's langur (Trachypithecus delacouri), Vietnam
21. Golden-headed langur (Trachypithecus poliocephalus poliocephalus), Vietnam
22. Grey-shanked douc (Pygathrix cinerea), Vietnam
23. Tonkin snub-nosed monkey (Rhinopithecus avunculus), Vietnam
24. Hainan black-crested gibbon (Nomascus hainanus), China (Hainan Island)
25. Sumatran orangutan (Pongo abelii), Indonesia (Sumatra)
This report was prepared by the Primate Specialist Group of IUCN's Species Survival Commission (SSC) and the International Primatological Society (IPS), in collaboration with Conservation International (CI).
Adapted from materials provided by Conservation International.
Conservation International (2007, October 29). Primates: Extinction Threat Growing For Mankind's Closest Living Relatives.