Personal grooming
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Grooming is the practice of cleaning and maintaining parts of the body. It is a species-typical behavior.
Summer Morning (at Spadarvet), by Carl Larsson, 1908
Preening male ruff
Mutually grooming ponies at Turf Hill, New Forest, U.K.
A domesticated cat grooming
Preening
Videos
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
Personal grooming
…Extracting foreign objects such as insects, leaves, dirt, twigs and parasites is a form of grooming. 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…
When preening, a bird (such as this red lory) draws individual feathers through its beak, realigning and re-interlocking the barbules.
Greater flamingo preening in Camargue, France
A humboldt penguin preening at Copenhagen Zoo, Denmark
Birds, like this two-barred crossbill, typically use their beak to gather preen gland oil from the uropygial gland.