The toque macaque (Macaca sinica) is a reddish-brown-coloured Old World monkey endemic to Sri Lanka, where it is locally known as the rilewa or rilawa. It is named for the toque-shaped whorl of hair on its head, rather like the bonnet of the related bonnet macaque.
It lives in troops, sometimes numbering up to 20, and has developed into three subspecies. This is a medium-sized monkey, although it is the smallest living species of macaque. It has a head and body length of 35–62 cm (14–24 in), a tail length of 40–60 cm (16–24 in). Males, at a weight of 4.1 to 8.4 kg (9.0 to 19 lb), can occasionally attain much larger sizes than females, at a weight of 2.3 to 4.5 kg (5.1 to 9.9 lb).
Toque macaques live only in Sri Lanka. They look very different depending on their habitat. Toque macaques prefer natural forest land ranging from sea-level up to 6,000 feet. Those living in cold climates have thick, dark brown fur and short limbs and tails, while those living in the lowland rainforest have reddish or golden colored coats and long umbrella-like bonnets. The dry zone race has light coats, long limbs and short bonnets or toque hair.