How to identify a Red-winged Blackbird
Adult males are black with red shoulder patches bordered by yellow. The red may be partly hidden when the bird is calm and spread widely during display. The bill is straight, pointed, and thicker than a warbler bill.
Females are brown with heavy dark streaking and a pale eyebrow. They can resemble a large sparrow, but the longer pointed bill, size, wetland setting, and nearby males are strong clues. Young males are mottled black and brown before adult plumage develops.
Red-winged Blackbird size and wingspan
Adults are about 17 to 23 cm long with a wingspan around 31 to 40 cm. Males are noticeably larger than females. Both are bigger and longer-billed than most sparrows.
A female can be confused with a Song Sparrow. Check body size, bill length, tail shape, marsh habitat, and whether the bird moves among cattails with other blackbirds.
What does a Red-winged Blackbird sound like?
The male’s territorial song begins with short notes and rolls into a rich, liquid, buzzy ending. It carries across wetlands and is often paired with a display that lifts the red shoulder patches.
Calls include sharp checks, whistles, and harsher alarm notes. Females also call and may join nest defense. Sound is most helpful when matched with an exposed male, cattail habitat, and the repeated display.
The main jobs of bird song are easy to see here: males advertise territories and breeding presence from prominent perches.
Habitat, range, and migration
Red-winged Blackbirds occur across most of North America. Breeding birds favor freshwater and saltwater marshes, wet ditches, sedge meadows, and fields with tall vegetation.
Northern birds migrate south, while many populations in the central and southern United States remain year-round. Outside breeding season they gather in fields, feedlots, pastures, and huge mixed blackbird roosts.
What do Red-winged Blackbirds eat?
Insects are important in summer. Seeds, grain, and waste crops become more important in fall and winter. Birds forage on the ground and probe around aquatic plants for hidden insects.
They sometimes visit yards for mixed grain or seed, especially during migration. They often prefer food scattered on the ground rather than a small hanging feeder.
Nesting, eggs, and territorial behavior
The female weaves a deep cup around upright cattail, bulrush, grass, or shrub stems, usually low above water or ground. A clutch commonly contains two to four pale blue-green or gray eggs with dark markings.
Incubation takes about 11 to 13 days, and young remain in the nest about 11 to 14 days. Both parents defend the nest, though females do most of the nest building and incubation.
Males can be bold near breeding territories and may dive at larger animals or people. Give active nesting areas room and move calmly through the wetland. This species is a clear example of song and display used to defend breeding space.
Similar birds and lifespan
Tricolored Blackbird males have a brighter white border below the red shoulder patch and a much more limited western range. Brewer’s Blackbirds lack the red shoulder, and male Common Grackles have longer tails and iridescent heads.
The oldest recorded Red-winged Blackbird was 15 years and 9 months old.
Listen before you scan the marsh
A singing male is much easier to hear than a hidden female is to see. Note the buzzy ending, repetition, and perch, then scan the tops of reeds and nearby wires. This is a good example of using sound with habitat and behavior.
Frequently asked questions
Do female Red-winged Blackbirds have red wings?
No. Females are mainly streaked brown and do not show the male’s bright red shoulder patches.
Do Red-winged Blackbirds attack people?
A territorial bird may swoop near someone who approaches a nest. Give the area more space and leave calmly.
Do Red-winged Blackbirds migrate?
Many northern birds migrate south, while populations in milder regions may remain all year.
More familiar birds
Listen next for the Common Yellowthroat, compare a streaked Song Sparrow, or browse Bird Guides.