Raptor talons and beaks are made of keratin, same as human fingernails. In the wild, the beak and talons are worn down by general use, wear and tear, hunting, landing, and so on, as well as the fact that they're generally going to miss a meal now and then.

Comparatively, captive birds of prey are less active in general, suffer less wear on their talons and beak because of that, and they also grow faster as they have a more steady diet and are fed a full balance of proper nutrients they need. As such, now and then, captive raptors need to be 'coped', a process by which the handlers use tools to remove some of the extra growth to keep them healthy.

While historically this was often done with files, or sometimes clippers, these days it's often done with a dremel as this increases the speed by which it can be done. Some birds are even calm enough to have this done while they are unhooded.

So here's Arrow fixing his beak that way so that it's a more appropriate size.

Drawn by Shiro

Posted using PostyBirb