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Brown-headed Cowbird (Molothrus ater)

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Cowbirds and Yellow Warblers

Brown-headed Cowbirds lay their eggs in other birds' nests. And these birds raise the cowbird chicks - often at the expense of their own young. This beautiful Yellow Warbler is a frequent target of the cowbird's unwelcome eggs. But it has developed a way to reject the role of foster parent. When... read more »

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Topics & Themes:  nesting

Cowbird Song and Password

As most young male birds get ready to leave the nest, they learn their species’ song by hearing their male parent sing it again and again. They imprint on their father’s song. So how does a Brown-headed Cowbird, raised by parents of a different species, learn to sing the correct song? The ... read more »

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Topics & Themes:  nesting, vocalization
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