Primates in Peril, was compiled by conservation and primate experts from around the world with first hand knowledge of primate population numbers and habitat conditions. Experts agree that 5 primate species from Madagascar, 6 species from Africa, 11 species from Asia and 3 species from Central and South America are all severely endangered. In worst case scenarios, only a few dozen animals are left in the wild. The 25 species listed in the report represent a wide range of primates from lemurs to gorillas.

According to experts, if conservation efforts by government and local communities are not initiated soon, many of these species will become extinct.