Feeding a feather

Red-necked Grebe (Podiceps grisegena) feeding a feather to a chick. A cool fact from Cornell "Like other grebes, the Red-necked Grebe ingests large quantities of its own feathers. The stomach retains two distinct masses (balls) of feathers, and their function is unknown. One hypothesis suggests that the feathers help protect the lower digestive tract from bones and other hard, indigestible material. The Red-necked Grebe also feeds its feathers to its young."

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