Rhesus Macaque

The rhesus macaque has grizzled brown upperparts, paler underparts and red skin on the adult face and rump. Head-and-body length is 45–64 cm and the tail adds 19–32 cm; males are generally heavier than females, and adult weight spans about 4–12 kg. It is one of the most geographically and ecologically adaptable non-human primates (Animal Diversity Web).

Rhesus macaques are diurnal and live in multi-male, multi-female groups organized by dominance relationships; females usually remain in their natal group while males disperse. Their omnivorous diet can include roots, herbs, fruit, leaves, seeds, insects, crops and small animals, changing with season and habitat. They readily use forests, open country and human-modified landscapes (Animal Diversity Web; Primate Info Net). It is Nationally Endangered (Thailand Red Data 2025).