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SQUIRREL MONKEY
IDENTIFICATION: A small (9—14 inch) monkey with a long tail; a pinkish white, heart- or skull- shaped facial pattern; and dense, yellowish or gray-green fur. DISTRIBUTION: Throughout most of northeastern South America, including Brazil, Colombia. HABITAT: Forests, swamps. STUDY AREAS: Monkey Jungle, Miami, Florida; Washington and California Regional Primate Research Centers; University of California—Santa Barbara; Max-Planck Institute of Psychiatry, Munich, Germany.
RUFOUS-NAPED TAMARIN
IDENTIFICATION: A squirrel-sized monkey with a mottled black and golden coat, a reddish tail and head, and a white crown. DISTRIBUTION: Northwestern Colombia through central Panama and Costa Rica. HABITAT: Tropical forests. STUDY AREA: Barro Colorado Island, Panama.
Social Organization
Squirrel Monkeys live in troops of 20—70 animals containing a majority of females. Younger males leave their home troops and live for several years in all-male “bachelor” bands of 2—10 monkeys, after which they join the cosexual troops as peripheral members. Females generally remain in their home troops for life, where they develop strong bonds with each other. Rufous-naped Tamarins live in cosexual groups of 3—9 individuals in which usually only one male-female pair breeds; the remainder of the group consists of their offspring and unrelated adult nonbreeders.
Description
