How to tell sex of Red Eye Tree frog. I just have one

[dendromad]

A. Callidryas only develope nuptial pads during breeding season, so that will not be enough to sex it unfortunately (unless he is simulating that with a single male)

I'm well aware of that, but there is another way I know that has been pretty reliable for me to sex when not in condition. Every female I have seen (and it is a lot) has the white extend right down onto the thumb, in males it doesn't it just barely goes onto thumb only as far as where nuptial pad starts. Have a look at your and see if you can see it.