Parts of a bird beak

thumb|Comparison of bird beaks, displaying different shapes adapted to different feeding methods; not to scale The beak or bill is an external rostrum structure found mostly in birds. A beak is used for pecking, grasping, and holding (in probing for food, eating, manipulating and carrying objects, killing prey, or fighting), preening, courtship, and feeding young. The terms beak and rostrum are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, rhynchosaurs, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a bill-like str

In jawed vertebrates, the mandible (from the Latin mandibula, 'for chewing'), lower jaw, or jawbone is a bone that makes up the lowerand typically more mobilecomponent of the mouth (the upper jaw being known as the maxilla).

REDIRECT Beak#Cere Category:Bird anatomy Category:Parts of a bird beak

A commissure () is the location at which two objects abut or are joined. The term is used especially in the fields of anatomy and biology.

anatomical feature found in some species of birds, reptiles, and amphibians