World's Most Endangered Species

Less than 200 Tonkin snub-nosed monkeys are left in the world, all in northeastern Vietnam. Once believed to be extinct, the species' biggest threats are the loss of habitat from illegal logging and hunting. They are one of the 100 most endangered species, according to a report released Sept. 11, 2012, by the Zoological Society of London and the International Union for Conservation of Nature. (Itsuo Inouye/AP Photo)