..At Wilpaththu National Park..
Chamath Savithra Photography 

 The toque macaque (/tɒk məˈkæk/; Macaca sinica) is a reddish-brown-coloured Old World monkey endemic to Sri Lanka, where it is known as the rilewa or rilawa (Sinhala: රිළවා), (hence "rillow" in the Oxford English Dictionary). Its name refers to the whorl of hair at the crown of the head, reminiscent of a brimless toque cap.