No, that is not Linda Blair of The Exorcist doing the wild thing. It’s a Tarsier, a small prosimian native of southeast Asia. The tarsiers can be thought of as the “owls” of the primate order, since they have many of the evolutionary adaptions to nocturnal living found in the Strigiformes lot: huge eyes for better night vision, and the uncanny ability to rotate their heads 180°. Differing from their avian brethren, they are mostly insectivorous, although they are known to prey upon the occasional bird or snake. The tarsiers have the largest eyes in proportion to body size of any known animal, as evidenced here.