Mafia Cowbirds: Do they muscle birds that don't play ball? | Science News

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Mafia Cowbirds: Do they muscle birds that don't play ball?

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11:56am, March 7, 2007

Cowbirds in Illinois that sneak their eggs into other birds' nests retaliate violently if their scam gets foiled, researchers say.

The brown-headed cowbirds of North America outsource ne

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