beak
The size and shape of the beak is related to the food the bird eats and can vary greatly among different birds. Parrots have down-curved, hooked bills, which are well-adapted for cracking seeds and nuts Figure below . Hummingbirds, on the other hand, have long, thin, pointed bills, which are adapted for getting the nectar out of flowers Figure below . Hawks, eagles, falcons and owls have a sharp, hooked beak.