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  • Female cowbirds pay attention to cowbird nestling survival, study finds

    Sep 9, 2015 11:15 am by Diana YatesResearch
    image of female cowbird and a prothonotary warblers

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    • image of female cowbird and a prothonotary warblers

    Brown-headed cowbirds lay their eggs in other birds’ nests and then disappear, the story goes. But a new study suggests cowbird moms pay close attention to how well their offspring do, returning to lay their eggs in the most successful host nests.