Red-winged blackbird Photo © Laura Erickson
CUBS Bird Guide

Red-winged Blackbird

Regional Species



range map
View dynamic map of eBird Sightings
habitat icon


Red-winged Blackbirds spend the breeding season in wet places like fresh or saltwater marshes and rice paddies. You may also find them breeding in drier places like sedge meadows, alfalfa fields, and fallow fields. Occasionally, Red-winged Blackbirds nest in wooded areas along waterways. In fall and winter, they congregate in agricultural fields, feedlots, pastures, and grassland.

food icon


Red-winged Blackbirds eat mainly insects in the summer and seeds, including corn and wheat, in the winter. Sometimes they feed by probing at the bases of aquatic plants with their slender bills, prying them open to get at insects hidden inside. In fall and winter they eat weedy seeds such as ragweed and cocklebur as well as native sunflowers and waste grains.

behavior icon


Male Red-winged Blackbirds spend much of the breeding season sitting on a high perch over their territories and singing their hearts out. Females tend to slink through reeds and grasses collecting food or nest material. Both males and females defend nests from intruders and predators. Red-winged Blackbirds nest in loose groups in part because appropriate marshy habitat is scarce. Typically five or more (up to 15) females have to crowd their nests into any one male’s territory. They typically mate with the territory holder, though many also mate with nearby males. In fall and winter, Red-winged Blackbirds flock with other blackbirds, grackles, cowbirds, and starlings, feeding on open ground and roosting in flocks of thousands or millions of birds. Red-winged Blackbirds are strong, agile fliers.

nest icon


Females build the nests by winding stringy plant material around several close, upright stems and weaving in a platform of coarse, wet vegetation. Around and over this she adds more wet leaves and decayed wood, plastering the inside with mud to make a cup. Finally, she lines the cup with fine, dry grasses. One nest picked apart by a naturalist in the 1930s had been made by weaving together 34 strips of willow bark and 142 cattail leaves, some 2 feet long. When finished the nest is 4 to 7 inches across and 3 to 7 inches deep.


Typical Sound


© Wil Hershberger | Macaulay Library

Size & Shape


Color Pattern

Male Red-winged Blackbirds are hard to mistake. They're an even glossy black with red-and-yellow shoulder badges. Females are crisply streaked and dark brownish overall, paler on the breast and often show a whitish eyebrow.

Plumage Photos

Similar Species

Where Tricolored and Red-winged Blackbirds overlap in California, male Tricolored Blackbirds can be distinguished by their overall glossier plumage and a white border to their epaulets (shoulder patches). Female Tricolored Blackbirds are a somewhat colder charcoal-gray overall with less streaking than female Red-winged Blackbirds. Song Sparrows and other streaky sparrows sometimes look like female Red-winged Blackbirds, though they are smaller and shorter tailed, with a shorter, thicker bill than a blackbird.

Did you know?!

  • Male Red-winged Blackbirds fiercely defend their territories during the breeding season, spending more than a quarter of daylight hours in territory defense. He chases other males out of the territory and attacks nest predators, sometimes going after much larger animals, including horses and people.