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- #61
calicocows
Crowing
That makes a lot of sense, thank you!!It's debated, but mostly thought to be a combination of "powder down," disintegrated keratin sheaths from growing feathers, and dead skin cells. Some downy feathers in birds disintegrate (purposefully) into a substance called "powder down" which helps keep their feathers dry and fluffy. When birds preen, they're distributing this powder down, rearranging their feathers, pulling shed keratin and skin cells to the surface, and shaking it all out. They also distribute oil from their preening glands to condition & waterproof their outer feathers. Doing this helps keep everything orderly, dry, poofy, insulatory, and keeps them from getting stuck together/dirty. It's also why they love dust bathing, it helps keep their feathers dry and separated. And it's why sick birds that can't/aren't preening properly start looking raggedy pretty quickly.