Serrated hinge-back tortoise  (Kinixys erosa)

Hinge-backed tortoises (species belonging to the genus Kinixys) have the remarkable ability to shut themselves entirely within their shells (4). This is due to the hinge at the back of the carapace (or shell) that can close off the tortoise's hind legs and tail (4). The serrated hinge-back tortoise has a slightly concave shell that is reddish-brown and yellow (2) (5). The scales at the rear of the shell have upturned edges giving, as their name suggests, a serrated appearance (2). The head is rounded and the tail has a small, claw-like protuberance at the tip. Male serrated hinge-back tortoises can be distinguished from females by their longer and thicker tails (2).