Ateles fusciceps

Brown-headed spider monkey (scientific name Ateles fusciceps) is a species of spider monkey, belonging to the New World monkey.

Brown spider monkeys live in loose small groups of about 20 members each, but it is rare to see them gathering together. Male brown-headed spider monkeys generally do not leave the group where they were born, but females do not. They like to eat fruits and leaves, but also eat nuts, seeds, insects, and eggs. Brown spider monkeys live in the canopy all year round. Due to the stable climate, they do not have to migrate long distances, but in some dry areas, they can move 18 kilometers a day in search of food.

The average estrus period of each brown spider monkey is only 26 days per year. Males need about 3 days of pursuit before they can mate with females, and mating lasts 5 to 10 minutes. Brown spider monkeys reach sexual maturity at 51 months and have one offspring per litter. The baby monkeys are weaned at 20 months, during which time the mother monkeys will not mate again. The average lifespan is 24 years.

The natives of the place of origin often capture them as food. Threatened by deforestation. The IUCN Red List lists it as "vulnerable" and includes it in Appendix II of the Endangered Species.

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