Here's some more fun facts about the tamarin monkey:
The various species of tamarins differ considerably according to their appearance, ranging from nearly all black through mixtures of black, brown and white. Many species typically have mustache-like facial hairs. Their body size ranges from 18 to 30 cm (plus a 25 to 44 cm long tail) and they weigh from 220 to 900 grams. Tamarins differ from marmosets primarily in the fact that the lower canine teeth are clearly longer than the incisors.
Tamarins are inhabitants of tropical rain forests and open forest areas. They are diurnal and arboreal, and run and jump quickly through the trees. Tamarins live together in groups of up to 40 members consisting of one or more families. More frequently, though, groups are composed of just three to nine members.
Tamarins are omnivores, eating fruits and other plant parts as well as spiders, insects, small vertebrates and bird eggs.
Gestation is typically 140 days, and births are normally twins. The father primarily cares for the young, bringing them to their mother to nurse. After approximately one month the young begin to eat solid food, although they aren't fully weaned for another two to three months. They reach full maturity in their second year.
In captivity, tamarins live to be 18 years old.