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| Shot this robin off of Hawk Lake Trail in York, PA today |
Last autumn most robins migrated south, but every winter at least some robins stay in PA. Robins have survived blinding blizzards, ice storms, and nights as cold as 10 below zero without human help.
Regardless of how cold it is on the outside of their feathers, their body temperature under the feathers is about 104 degrees. How do they stay warm enough to survive? Their thick down feathers hold body heat in. They produce body heat by shivering. And they get the energy to shiver from their food, like juicy earthworms.
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