Their long, soft fur keeps them warm at high altitudes. Marmosets One of the world's smallest primates, often weighing less than a pound and not longer than 10 inches. Their calls are high-pitched and sound bird like in nature. Their hair is luxurious and often golden in color. The marmoset specialized teeth have developed to aid them in gouging holes in gum trees.
Pygmy marmosets are the smallest of the species.
The adult weighs only 3 ounces and both head and body are no more than 6 inches in length though the tail is somewhat longer. Greater Coquerel's Mouse Lemurs One of the smaller lemurs, Mouse lemurs rarely exceeds 280 to 320 grams. Lemurs are lower down on the evolutionary scale and are less intelligent than monkeys. They have a good sense of smell but lack binocular vision. Lemurs are docile, gregarious animals that live in groups of 10 or more.