Scientific name: Agelaius phoeniceus
The Red-winged Blackbird is often considered to be the most abundant bird in North America. Broadly distributed across much of the continent, it leaves the northernmost parts of its breeding range in the winter. Red-winged Blackbird migration takes place during the day, and usually in large flocks.
Nest parasitism of Red-winged Blackbirds by the Brown-headed Cowbird is very common, reaching nearly three-quarters of nests in one study. Parasitized nests often raise fewer blackbirds because the female cowbird may remove a blackbird egg when she lays her own.