A hard, protruding mouthpart found in birds, used for eating, grooming, and other behaviors, characterized by its shape and size, which often varies among species based on their habits and diets.

The specialized structure at the front of a bird's head that serves as its primary organ for feeding, which can also reflect the age or experience of the bird, as seen in certain expressions and idiomatic uses in Japanese.

A term referring to the bird's mouth that can express various meanings in metaphorical contexts, such as "to intervene" or "to speak out," illustrating the dual functionality of language in relation to physical attributes.