Check the tail length: males usually have longer, thicker tails
Check the cloaca position: males usually have it farther from the body
Check the plastron shape: males often have a concave underside
Check the shell size: females are often larger
Check the front claws: males often have longer front claws in some species
Check the head size: males may have larger heads in some species
Check the species: sex traits vary by turtle species
Check the age: young turtles are often hard to sex accurately
