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Sharper, straighter, stiffer, stronger: Male green hermit hummingbirds have bills evolved for fighting

University of Washington

Nov 21, 2025

A female green hermit hummingbird hovers before a flower. Credit: Jan Lenaert. Let's get one thing out of the way: All hummingbirds fight. Most species fight for food, using their…

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Sharper, straighter, stiffer, stronger: Male green hermit hummingbirds have bills evolved for fighting

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