Red-eared sliders (Trachemys scripta elegans) are some of the most frequently spotted turtles around, in their natural sluggish-water environments as well as in captive habitats. If you come across one of these family Emydidae creatures in the wild, you might be able to confound your pals by specifying the sex. Boy and girl red-eared sliders have some sexual dimorphism and therefore look somewhat different -- though both sexes have the signature red markings close to their eyes.