Why don’t cowbirds feed their chicks?

The brown-headed cowbird (Molothrus ater), a native of North America, doesn’t build a nest. It also doesn’t feed its chicks, stick around for their first flight, or comfort them during storms. How can a bird species survive when it doesn’t care for its young? The answer involves covert egg-laying, chick sabotage, and the unwitting generosity of other songbirds.

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