Saguinus

The genus Saguinus, commonly known as tamarins, comprises a group of small, long-tailed South American monkeys that are similar in appearance to squirrels. These tree-dwelling primates exhibit quick, jerky movements and possess claws on all digits except their big toe, which aids them in scampering along branches.1

Tamarins are diurnal and live in small social groups. Their diet is omnivorous, consisting primarily of insects, fruit, tree sap, and other small animals. While "true" marmosets (genus Callithrix) have short canine teeth, tamarins (genera Saguinus and Leontopithecus) are distinguished by their relatively long lower canines. Some tamarin species, like the emperor tamarin (S. imperator), are known for distinctive features such as a long white mustache.12