That's useful in more than one way - now he knows to aim for the head, if possible, and he's reminded how much there is here that's unfamiliar. That's promising, jumping into a new place and immediately walking into a battle where the enemies are completely unfamiliar. Well. He's been in worse situations. "Might be helpful for us to have some description of who we're looking for. Just in case. And if you have anything of theirs, it wouldn't hurt for Donald to have some idea of their smell."