I agree, it doesn't look right. Not sure if the head is fully propped against the tree or the guy's leg, but the guy looks like he's barely trying to hold the head up. Right pinky isn't really even being applied.
Even when you cover the head and the man up (anything that be used to scale the animal), the body just looks completely unnatural. Maybe it's just a freak of nature. Or an experiment. Wouldn't surprise me. Nothing does, these days.