I have 2 one is bigger with larfer nails and the other is smaller with shorter nails and a shorter tail but their the same type of turtle.

3 Responses to “How Do You Tell The Gender Of A Red Eared Slider Turtle?”

  1. sunkisse

    When they are around 4″ SCL (straight carapace length) you will start noticing some sexual characteristics. The best and only way to definitely sex a RES is by the tail. Males store their penis in their tail and therefore, their tail is thicker and longer than the tail of a female.
    There are secondary sexual characteristics. Males will have LONG claws and females will be bigger in overall size.
    hope that helps some:-) good luck!!!

  2. Han Solo

    All previouse answers are correct, also you can feel and look at thier plastron (bottom of shell) on males it is concave and on femals its is flat

  3. M B

    The above answer is correct, there are a few other small details as well. Please see this page, about halfway down there is the question “Is my turtle a boy or a girl?”http://www.austinsturtlepage.com/Info/in…
    It gives details about identifying the gender and also has pictures to give you some idea of what to look for.
    Please note that the website mentioned is not mine, its just a good source of info on turtles in general.

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