White-footed tamarin

The white-footed tamarin (Saguinus leucopus) is a tamarin endemic to Colombia. It is a silvery brown colour with pale streaks and russet underparts and looks very like the cotton-top tamarin, from which it is separated by the Atrato River; the two are thought to have diverged during the Pleistocene, when a sea occupied the area between their present ranges. It is arboreal and lives in small family groups in the canopy. Females give birth to one to three young after a gestation of about 140 days. Its range is relatively small, and destruction and fragmentation of its forest threaten it, so the IUCN has assessed its conservation status as vulnerable. Some authorities hold that it is very closely related to the cotton-top tamarin, a view supported by dental morphology and by the similar changes in fur colour as the young become adults.