ScienceDaily Posted January 2, 2019 Share Posted January 2, 2019 Hummingbirds are fierce fighters, but also efficient feeders with tongues and bills well adapted to extracting every bit of nectar from a flower. Why, then, do the males of some tropical species have bizarre hooks, serrations and hard tips that defeat efficient nectar extraction? Using high-speed video, researchers have documented how these males use their weaponized bills to fight rivals for food and mates, and the trade-offs in choosing fighting prowess over feeding. View the full article Quote Link to comment Share on other sites More sharing options...
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