So i have 4 of them, one i think might be a female, im not a 100% sure yet, i was wondering if i could get an expert to help me out. im trying to see if i can breed them in the future
i have some photos for refrence:

it seems to have some brown coloring at the legs, its larger/more rotund than the rest, and never croaks like the rest, the other males tend not to horse around with him/her, although ive only seen it croak once, when one of the smaller males stole a cricket that it had targeted, other than that it rarely makes a sound
Name: IMG_4407.jpg Views: 170 Size: 107.9 KBName: IMG_4416.jpg Views: 194 Size: 105.1 KBName: IMG_4438.jpg Views: 178 Size: 62.9 KB
Compared to one of my males:
Name: IMG_4443.jpg Views: 152 Size: 78.2 KB
so am i right in saying its a female? i'm still new in the herpetology game..