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As Round as a Ball —But Fat?
When it's cold, a hummingbird often looks fat because it's fluffing its feathers for extra insulation. A hummingbird's body temperature is about 105°F. By fluffing its feathers, the hummingbird is able to trap the warm air and protect its tiny body from the surrounding cold air. Hummingbirds are also known for their ability to enter a state called torpor. Read more about this important adaptation hummingbirds have survive when it's cold.
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Image courtesy of Anne Green |