red eye turtles

Question
how do you tell if its a male or female?

Answer
I would have to know for sure the species. There is no species called the 'red-eye turtle'. If it IS a box turtle, red eyes often indicate males.

You can also not tell the sex on young turtles, so if it is not mature yet, you can't know.

Try http://www.turtleforum.com for more ideas and info.