what species does the cowbird match
The Brown-headed Cowbird (Molothrus ater) is a brood parasite, meaning that it lays its eggs in nests of other species. A female cowbird quietly searches for female birds of other species that are actively laying eggs. Compound Problem. The cowbird does not depend exclusively on a single host species; it has been known to parasitize over 220 different species of North American birds and therefore spreads its impact across many populations.