They can be tricky. But trust me, I have had quite a few male Texas tortoises here. When they concave I'm talking like 4" or so concave. Males also have female looking anal scutes that create a circle. Females resemble a male(typical of other tortoises) look like anal scutes. Also that one is looking captive cared for and a young female. If that were male at that size it would be full blown adult and very very concave. I will try and find some pics of my males I had here. Females tend to stay shaped more round as well in this species. Females also have more of a pronge gular scute where as males gular will taper off more of an angle at the end. Kinda hard to explain via written format. Let me try and find some photos for you.This is why i thought the sex was male. Good sized indention on the bottom right before the hind legs.
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