Eastern Mud Turtle

A small to medium-sized kinosternid turtle typically measuring 3–5 inches (7.6–12.7 cm) in carapace length. Carapace is oval, moderately domed, and smooth, lacking keels or serrations, with coloration ranging from olive to dark brown or nearly black, often uniform and without distinct patterning. The head is relatively small with subtle light striping or mottling, though markings are often faint. Limbs are moderately webbed. A key feature is the well-developed, hinged plastron, which is yellow to brown and may have variable dark markings, allowing the turtle to partially close its shell. Skin is smooth. Ventral surface coloration varies from yellowish to brown. Typically inhabits shallow, slow-moving or still freshwater habitats including ponds, marshes, ditches, and floodplain wetlands, often favoring soft, muddy substrates and abundant vegetation. Frequently leaves the water and may be encountered traveling overland, especially during wet conditions. Primarily nocturnal or crepuscular. Diet is omnivorous, consisting of aquatic invertebrates, insects, carrion, and plant material.

Similar species: Mississippi Mud Turtle (Kinosternon subrubrum hippocrepis) is similar but often shows more distinct head striping and regional variation; Musk Turtles (Sternotherus spp.) have a reduced plastron, more domed carapace, and often possess a distinct musky odor when handled; Painted Turtles (Chrysemys picta) have bright red and yellow markings and lack a hinged plastron.