One of the most common semi-aquatic turtles in Missouri. The color of the upper shell is olive-brown with numerous black and yellow lines. The lower shell is yellow with a large dark brown blotch on each scute. The head and limbs are dark green with narrow black and yellow lines. A distinct red or orange stripe is normally present on each side of the head behind the eye. Old males are often covered with an excess of black pigment that obscures both the red stripes and the yellow ones.