The bottom of a turtle's shell (called the plastron) is also used as an indicator for determining gender in turtles. Behavior There is one way that will certainly tell you the gender of a red-eared slider with a 100 percent accuracy. The curved in shape of the male turtle’s plastron enables the male turtle to mount the female turtle easily when mating. Another factor to consider when finding out whether a turtle is male or female is to calculate the length of the tail. Even if there is no male is around a female will still lay eggs, the only difference is that those eggs won’t be fertilized. Male Eastern Snake-Necked turtles may have a long tail, when compared to a female. A female turtle will have a flat chest or plastron. However, unlike many mammals, turtles have no external genitalia. The tail of the male is longer and thicker than that of the female. In reality, you need to actually observe what comes out of the tail to be sure if the turtle is male of female. Male turtles have a longer tail, and the cloaca is much further down, closer to the tip of the tail, than on a female. Taking care of a female turtle that is about to lay eggs is not very hard, you barely have to do anything, so don’t worry about this part. The American box turtle: 90 percent of the time, male box turtles have red or orange irises while the female has brown or yellow ones. Assumeing your turtel is a box turtel a male box turtels eyes are firey red oppesed to a female whice are brown ,and if tou turn the turtel upside down and look at the plastron a male turtel has a concaved plastron near its tail where as a females is flat. This concave appearance allows male turtles to mount a female turtle easily and gives females plenty of extra room to carry their eggs. When sea turtles are juveniles, it is very difficult to tell their sex by eye as they do not differ externally. A female turtle will lay eggs while a male turtle won’t. How To Tell If A Turtle Is Male Or Female Pet Turtle Turtle Habitat Turtle … In the male turtle, the plastron will take a concave or a curved in shape. Female turtles have a short tail which generally doesn t extend more than 10 cm 4 inches past the edge of the carapace. Male turtles have a curved in plastron that almost looks like defined pectoral muscles on a man. If you observe the turtle nesting, such as the one below, then obviously it is a female. By carefully observing these parts on adult turtles you can easily distinguish a female from a male red-eared slider turtle. This makes determining their sex much more difficult, but it's not impossible. But some females have a large tail when compared to a male. However, after reaching sexual maturity male sea turtles develop a long tail, which houses the reproductive organ.The tail may extend past the hind flippers. Male turtles have a concave (curved in) plastron while females have a flat one. Female turtles have a short tail, which generally doesn’t extend more than 10 cm (4 inches) past the edge of the carapace. Turtles have a hard shell but their shells are not designed to withstand being bounced off asphalt. However, on the female turtle, the plastron will be flat. Also, the female has a tendency to have a higher-domed, more rounded shell, whereas the male has a lower shell with more of an oval or oblong appearance. Sep 9, 2015 - If you keep pet turtles, it's nice to know if you've got boys or girls. In addition, certain species of male turtles have a scale at the tip. There won’t be any curvature or even a protruded type of touch at all.   These shapes enable male turtles to more easily mount a female during mating, and they give females more room to hold eggs internally.