Unable to build nests or care for their young, a female cowbird lays up to 40 eggs a year in the nests of other birds, including warblers, vireos, flycatchers, and thrushes.


a female cowbird lays up to 40 eggs a year in the nests of other birds, including

a female cowbird will use the nests of other birds to lay up to 40 eggs a year, including those of

female cowbirds use the nests of other birds to lay up to 40 eggs a year, including those of

female cowbirds lay up to 40 eggs a year in the nests of other birds, including

up to 40 eggs a year are laid by female cowbirds in the nests of other birds, including

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