When I bought my FTBs they were only slightly different sizes. However, I expect at least one to be male, as he barks at night!
How can I tell males from females?
Мy darlings :0.2.0 Calico and Tuxedo cats Ksyenja and Koshek
1.1.0 Xenopus leavis Carlos and Cecil
2?.0.2 Bombina orientalis Ivan the Terrible, Peter the Great, Lenin and Putin
0.1.0 Grammostola rose Megan Wallaby
1.1.0 Heterometrus laoticus Ian and Isaac
FBTs mature in about a year. Up until that time, it will be difficult to tell what sex they are. Generally, females are larger and more rotund than males. Sexually mature males will call, have spiny dorsal skin (female skin will be much smoother), and thicker forelimbs. The toe webbing on the males will extend to the color tip of the toes, while the female webbing does not extend to the tip of the toes. Males will have dark (black) nuptial pads on the forelimb fingers. These pads are rough, horny skin that helps the male grab on to the female during amplexus (mating embrace). To be absolutely sure that you have a male, check these secondary sexual characteristics: call and nuptial pads. These frogs are very primitive and engage in inguinal amplexus, which means that the male will wrap his forelegs ("arms") around the females waist or lumbar area.
Terry Gampper
Nebraska Herpetological Society
“If we can discover the meaning in the trilling of a frog, perhaps we may understand why it is for us not merely noise but a song of poetry and emotion.”
--- Adrian Forsyth
Мy darlings :0.2.0 Calico and Tuxedo cats Ksyenja and Koshek
1.1.0 Xenopus leavis Carlos and Cecil
2?.0.2 Bombina orientalis Ivan the Terrible, Peter the Great, Lenin and Putin
0.1.0 Grammostola rose Megan Wallaby
1.1.0 Heterometrus laoticus Ian and Isaac
It is almost impossible to tell the sex of FBTs. I thought I had 2 females and a male, as two are morphologically female as they are larger and to me look very frog-like (the shape of wild frogs up here in SK). My male is smaller and has a rounded body (width not girth). He also has some extra skin on his neck (expands during vocalization). The tricky part is that I have seen all 3 calling. Females are not supposed to call but I have heard of many accounts of females tricking their keepers into thinking they are male (eggs laid in a male-only tank). My answer is: does is really matter which sex they are? I've given up on figuring out mine unless i find eggs.
Мy darlings :0.2.0 Calico and Tuxedo cats Ksyenja and Koshek
1.1.0 Xenopus leavis Carlos and Cecil
2?.0.2 Bombina orientalis Ivan the Terrible, Peter the Great, Lenin and Putin
0.1.0 Grammostola rose Megan Wallaby
1.1.0 Heterometrus laoticus Ian and Isaac
Hahaha ya i wanted to know for the same reasons. But I thought to myself, they r toads, it's not like they will care what their name is. So i have two female names (willow and ivy) and a male name (echo). They don't care so you shouldn't let it bother you
Мy darlings :0.2.0 Calico and Tuxedo cats Ksyenja and Koshek
1.1.0 Xenopus leavis Carlos and Cecil
2?.0.2 Bombina orientalis Ivan the Terrible, Peter the Great, Lenin and Putin
0.1.0 Grammostola rose Megan Wallaby
1.1.0 Heterometrus laoticus Ian and Isaac
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