We have to turn to our old idol, animal expert Jonas Wahlström, and ask him how we can determine the sex of a squirrel. We see them almost daily but we have yet failed to determine the if they are male or female. According to our research, a nursing squirrels has exposed nipples and if you look at a male squirrels from behind you are supposed to see his… well… nuts. So far these facts hasn’t been of any help. And then there is that (very unreliable) source that claims that the squirrel penis has a little hook. So Jonas, what are your best tips for deciding the sex of a squirrel? Please enlighten us! What about the little fella in the image for example – what is it we see?