This is an immature male Red-winged Blackbird. They congregate at our feeders in groups and are often found with Brown-headed Cowbirds.
Male Red-winged Blackbird
Female red-winged blackbird
Photo courtesy of my brother David. Taken in Martinez, Calif.
Female Red-winged Blackbird in British Columbia, Canada, May 1998
Male; Seen at Brazos Bend State Park, TX in early February
With a beak full of seed
Rear view, showing the colors
Singing his heart out at the top of a tree
A male and female at the feeder during our big blizzard-sorry, the picture isn't good
Red-Winged Blackbird at my feeder
Female Red-Winged Blackbird