Male monkeys have large throats and specialized ... These vocal primates are the biggest of all the New World monkeys. Unlike Old World monkeys, howlers and other New World species have wide ...

A male Drill’s buttocks are incredibly ... The Guinea baboon, and the mantled guereza, both of which belong to the Old World group, and the spider monkey, a New World member.

Under undisturbed conditions Old World monkey infants are weaned by their mothers at the ... Goo & Fugate (1984) studied breeding groups [one male and seven females] of rhesus macaques (Macaca mulatta ...

A team of researchers from the Tokyo University of Science (Japan), led by Koichi Watashi, has discovered why Old World monkeys, such as the crab-eating macaque, naturally display HBV resistance, ...