Characteristic         

C. amboinensis is the most common turtle on Borneo, and the only species able to close its shell completely via a well-developed plastral hinge (So-called ‘Box Tutle’). These turtles have a black or dark brown carapace. Their skin and limbs are black or faded black. They have light yellow streaking on their neck and face. The carapace of an adult Asian box turtle is highly domed, with a medial craniocaudal keel that tends to disappear with age. Males usually have a slightly concave plastron, and females have a flat plastron. Males also have longer, thicker tails.