How to tell the sex of a turtle?

First observe the turtle’s plastron: a male’s plastron is noticeably uneven and concave, while a female’s is relatively flat. Next, look at the cloaca: a male’s is close to the tail and elongated, while a female’s is closer to the plastron and round.

Finally, males are generally smaller with black shells and a noticeable odor, while females are larger with tan-yellow shells.