Range & Habitat
Found in tropical rainforest, tropical dry forest of southeast Brazil.
Marmosets are small, squirrel-like primates with incisor teeth that are specially shaped to allow them to carve small holes in the trunks of trees, from which they drink the tree sap and gum that oozes out. Marmosets are diurnal and sleep at night in tree holes or other shelters. During the day they roam around territories that may be up to five hectares in size.
The dominant female gives birth to twins after a gestation period of about 4.5 months. The birth weight of the litter is high, about 20% of the mother's weight. This would be the same as a human giving birth to twins each weighing 5 kg (11 lb)! All group members, including the father, take part in carrying the young, with the mother periodically suckling the young. Marmoset infants are completely dependent for the first two weeks but they are weaned by two months, can move independently and collect their own food. They reach puberty at 14-18 months and adult size at two years. Their lifespan is around 10 years.
In the Wild: Marmoset's diet consists fruits, nectar, plant gums and saps, insects, small lizards and birds. In the Zoo: Fruits, vegetables, monkey biscuits, meal worms and marmoset diet.
Geoffroy's marmoset lives in groups and pairs. Each troop contains only one pair that breeds but the other members, usually older offspring of the mating pair, help to carry and protect the young of the breeding pair. When facing predators this species may voice alarm calls, freeze, flee or mob the predator.