cowbird(redirected from common cowbird)
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Any of various blackbirds of the genus Molothrus, especially the common North American species M. ater, that lay their eggs in the nests of other birds and are often seen accompanying herds of grazing cattle.
[From their habit of staying with cattle.]
(Animals) any of various American orioles of the genera Molothrus, Tangavius, etc, esp M. ater (common or brown-headed cowbird). They have a dark plumage and short bill
any blackbird of the genera Molothrus and Schapidura, noted for their brood parasitism, esp. the common North American species M. ater.