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When preening, a bird (such as this red lory) draws individual feathers through its beak, realigning and re-interlocking the barbules.. Preening is a maintenance behaviour found in birds that involves the use of the beak to position feathers, interlock feather barbules that have become separated, clean plumage, and keep ectoparasites in check.
Preen gland secretion of some, but not all, birds have shown to be antimicrobial. Some birds harbor bacteria in their preen gland, which to date, have (exclusively) been isolated from preen glands (e.g. Enterococcus phoeniculicola [7] and Corynebacterium uropygiale [8]). Some of those bacteria add to the antimicrobial properties of preen wax.
Among animals, birds spend considerable time preening their feathers. This is done to remove ectoparasites, keep the feathers in good aerodynamic condition, and waterproof them. To do that, they use the preen oil secreted by the uropygial gland, the dust of down feathers, or other means such as dust-bathing or anting.
Birds engage in allopreening, which researchers believe builds pair bonds. [59] In 2010, researchers determined the existence of a form of social grooming as a consolation behavior within ravens via a form of bystander contact, whereby observer ravens would act to console a distressed victim via contact sitting, preening, and beak-to-beak touching.
Preening, personal grooming of a bird's feathers especially by using its beak; Preen gland, also called the uropygial gland, an oil gland found in many bird species; Preen oil, an oil made by the uropygial gland found in many bird species
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