Bobolink, a North American bird related to the oriole and blackbird. The bird's name comes from its song, bob-o-lee, bob-o-link. A bobolink is about seven inches (18 cm) long. The female has olive plumage streaked with black and is yellowish underneath. In the mating season the male is black, white, and buff. At other times, he resembles the female. The female lays four to seven white eggs, streaked and spotted with lilac and brown. The simple nest of dried grass stems is hidden in a meadow.
Bobolinks breed from Montana to Nova Scotia and southward to the latitude of the Ohio Valley. In grain-growing states, bobolink families gather in large flocks at harvest time. After feeding on ripened grain, they migrate—at night—and reappear in the rice fields of the South, where they consume large quantities of the crop. Here they are known as ricebirds or reed-birds. They then resume their southward migration, chiefly by way of Florida, and pass the winter south of the Amazon River.
The bobolink is Dolichonyx oryzivorus of the oriole family, Icteridae.