Originally posted by Canada_Rockies I often wonder how they can fly with that front heavy beak. Nice shot.
I used to wonder that about several birds until, in graduate school, I handled the skull of a toucan that still had the beak in place. The beak is, of course, made of keratin, the protein that makes feathers, hair, claws, hooves, fingernails, baleen, the outer horn sheath of bovids, the entire horn of a rhino, porcupine quills, etc. There's a slight difference in the keratin of bird feathers, claws, and beaks compared to mammalian keratin structures, but the difference is trivial. To get back to the toucan and its huge beak. As I found, it is literally as light as a feather.