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 the Red-winged Blackbird's diet.
Fun Fact The Red-winged Blackbird aggressively defends its territory from other animals. It will attack much larger birds. Males have been known to swoop at humans who encroach upon their nesting territory during breeding season.