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made the flight before. There is still much to learn about how birds make such long flights and find precisely the right spot.
Birds have a number of ways to beat the cold, but none so important as their feathers. You may have noticed how, on a very cold day, the birds at your feeder seem rounder and more puffed-up than usual. This is a way of keeping warm by adjusting the feathers to create pockets of
warm air. Many species
change their plumage,
molting into a fresh,
thick set of feathers
orior to the colder
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