Three-toed box turtle

The carapace is relatively high and dome-shaped with a low keel running down the midline. The carapace is brown, but may have an indistinct pattern of yellow to orange lines and spots. An older individual may be patternless and have a pitted shell. The unpatterned plastron is tan to dark brown and has a hinge. In a male, the posterior part of the plastron is slightly concave. Some males have a great deal of red or orange coloration on the head. Normally, this turtle has only three toes on the hind foot, but occasionally it has four toes. The hind feet are rather stumpy and not webbed. The male occasionally has red eyes, whereas a female has yellow or brown eyes. (taken from "A Field Guide to Oklahoma Amphibians and Reptiles")