Marmosets have long incisors (front teeth) adapted to chisel small holes in trees to drink sap and gum.
Tamarins have longer canine teeth for meat eating. The Black-tailed Marmoset has grey-brown fur with lighter front end,
bare pink ears (not as startling as those of its close relative the Silvery Marmoset), a light stripe on its thigh and a long black tail.
It is native to west-central Brazil, eastern Bolivia and northern Paraguay.