The Red-winged Blackbird is sexually dimorphic; the male is all black with a red shoulder and yellow wing bar, while the female is a nondescript dark brown. Seeds and insects make up the bulk of their diet.The Red-winged Blackbird inhabits open grassy areas. It generally prefers wetlands, and inhabits both freshwater and saltwater marshes, particularly if cattail is present.
RED-WINGED BLACKBIRD Bird Spotting: The differences between the male and female red-winged blackbird are striking. While the plumage of the male is entirely black except for two bright red shoulder patches, the female is a dusty brown and heavily striped.