Deep in the rainforest, the monkeys are yodeling. Their wild calls echo across the foliage, sending signals of sex and ...

Spider monkeys are important seed dispersers for their rainforest homes. When animals eat fruit and nuts from trees and then go on their merry way, they eventually defecate the seeds and spread ...

The world's smallest monkey is the pygmy marmoset, which lives in the Amazon rainforest. Old World monkeys include macaques, baboons, mandrills, proboscis monkeys and langurs. Unlike many New ...