That's comforting.

*Snape finishes bandaging his leg as best he can, but he isn't sure that it will hold as he walks. Unfortunately, he can't put his leg in a sling like Wesley can with his arm, but he does use the large rib a bit like a staff as he limps along, trying to make small talk to keep his mind off the pain.*

So tell me about some of these demon species you've been trained to identify.