Name: Golden Marmoset
Left: Unknown
Habitat: Brazil and Bolivia
Why Endangered: Loss of habitat

The marmoset is one of the world's smallest kinds of monkey. Marmosets are less than 1 foot (30 centimeters) long, not including the tail, and weigh from 10 to 12 ounces (300 to 350 grams). The thick, soft coats of marmosets range in color from silvery-white to dark gray or brown. Patches of hair stick out from the head and ears of some marmosets. Unlike most other monkeys, marmosets have claws instead of nails. They live in trees and walk on all four legs, much like squirrels. Marmosets feed mainly on insects and fruit. They also chew holes in certain trees to eat the gum or sap. Most marmosets live in groups of three to eight in the tropical forests and woodland plains of Central and South America.

Marmosets are kept as pets and are used in medical research. They are threatened by the increasing destruction of their tropical forest habitat.

Source: World Book