Brave Red-winged Blackbirds

From Great River and Clarence Cannon National Wildlife Refuges:

Have you seen Red-winged Blackbirds chasing hawks and other large birds? Red-winged Blackbirds often try to drive potential predators, such as this Red-tailed Hawk, away from the airspace above their nesting territories. A pursuing blackbird stays above and behind the bigger bird, out of reach of its beak or claw.