The gray woolly monkey has a coarse ... live in social groups averaging about 50 individuals and led by an alpha male. These groups can spread out over several acres, and members keep in contact ...

Those who challenge this alpha male are apt to be cowed by impressive shows of physical power. He may stand upright, throw things, make aggressive charges, and pound his huge chest while barking ...

An outsider male macaque has issued a direct challenge to the leader of a toque macaque clan. If he wins, he'll become the new alpha and could decide to murder his ousted rival's offspring.

An official monkey catching campaign was launched week, prioritizing more aggressive alpha males. It has caught 37 monkeys so far, most of whom have been placed put under the care of wildlife ...