Enclosure doesn't look right, too dry and too open, is it just a pic, or it is how it is?
And yes, we can't sex a frog based on it's picture, we can make a good guess based on head shape when they are mature, but the only way to sex them by nuptial pads when frog is more then 2,5-3", if they are present - boy. As well is my their call, only boys call.