The Cotton-top Tamarin (Saguinus oedipus) is a small New World monkey weighing less than 0.5 kg (1.1 lb). One of the smallest primates, the cotton-top tamarin is easily recognized by the long white sagittal crest extending from its forehead to its shoulders. The species is found in tropical forest edges and secondary forests in northwestern Colombia where it is arboreal and diurnal
Silvery Marmoset - Mico argentatus - A member of the family Callitrichidae, this New World monkey lives in the eastern Amazon Rainforest in Brazil. Originally rainforest inhabitants, plantations have caused them to increase their range. This primate is diurnal and spends the night in tree hollows or in very close vegetation
Goeldi's Marmoset (aka Goeldi's monkey) is a small, South American New World monkey. They live in small social groups, however, they have been known to form polyspecific groups (ie. mixed-species groups) with Tamarins.
Geoldi's Marmoset (Goeldi's monkey or a callimico) is native to the upper Amazon Basin regions of Bolivia, Brazil, Colombia, Ecuador & Peru. A new world monkey they are usually black or dark-brown in color, with occasional red, white, or silver highlights on the head and tail. They have lengths 20 and 23 centimeters, and tails of about 25-30 centimeters. Considered vulnerable for extinction, this monkey is quite rare, and is often unseen because of its habit of foraging in dense undergrowth.
Red Howler monkey - Unlike other New World monkeys, both male and female howler monkeys have trichromatic color vision. This has evolved independently from other New World monkeys due to gene duplication. They have lifespans of 15 to 20 years.