What action involves wiping the beak to clean it of food fragments?

The term "to feak" specifically refers to the action of a bird wiping its beak to remove food debris or fragments after eating. This behavior is observed in various bird species, including raptors, and is an important part of their grooming process. Feaking helps to keep the beak clean and functional since a clean beak is essential for health and hunting efficacy.

The other terms, while they may imply some form of cleaning or maintenance, do not accurately describe the specific act associated with a bird wiping its beak. "To cleanse" and "to purify" are broader terms that don't pertain specifically to beaks or the actions of birds, and "to fetch" refers to retrieving an object, which is unrelated to cleaning behavior. Therefore, the choice of "to feak" accurately captures the behavior in question.