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BirdNote: How Feathers Insulate

01/14/12 8:57AM
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Copyright Claire McLean

A single Canada Goose has between 20 and 25 thousand feathers. Some are designed to help the bird fly or shed water. Many are the short, fluffy kind, the down that insulates the bird from the cold. How do feathers keep birds warm? This week on BirdNote, we'll take a look at the insulating qualities of feathers.

Birds survive in sub-zero weather by fluffing their feathers, creating layers of air and feathers. Just a fraction of an inch of this insulation can keep a bird's body temperature at 104 degrees, even in freezing weather.

Learn more about BirdNote.

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