Upper Amazonian rainforests of southern Colombia, eastern Ecuador and Peru, western Brazil, and northern Bolivia
Bamboo forest, dense undergrowth
Fruits, insects, small vertebrates
After the first ten to 20 days of its life, everyone in the group helps care for the single young.
Goeldi's monkeys like in groups of about six individuals.
The IUCN classifies these monkeys as near threatened.
Goeldi's monkeys are related to marmosets.