I can not be sure and I have already rained on one persons parade today.... It would be easier if he/she was standing next to another one...BUT
If you keep in mind I am far from an expert on this, I would say there is a good chance. He seems to have stout legs for a girl, maybe if you had he/she wearing high heels they would look more feminine. BUT that tail may need a little trimming before she/he tries on a bikini. sorry,,,, either a boy or a very masculine girl in my untrained eyes.