Bald eagles have 7,000 feathers. Feathers consist of interlocking microscopic structures that are light, but very strong. Layers of feathers trap air to insulate birds against cold and protect them from rain.

Use of feathers permit.

bald eagle head feathers

bald eagle tail feathers

bald eagle feathers

wing feathers

   Feathers are made of keratin and grow continuously, the same as an eagle's talons and beak. Feathers grow from follicles; if a feather follicle is damaged, the feather could possibly grow back incorrectly or it might not grow back at all.
   Feathers grow quickly; during molting, the new feather pushes out and replaces the old one.
   Additional feather facts.
   Bald Eagle Management Guidelines and Conservation Measures - The Bald and Golden Eagle Protection Act


Bibliography
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