Yellow-headed Blackbirds inhabit marshes that surround the potholes of the mid west.  Here, the brightly colored males are seen maintaining territories.  Females were in the reeds incubating eggs and young.  

A first winter male surprises residents of Westchester County, NY, when it showed up in January, 2010, in a mixed flock of Red-winged Blackbirds and Brown-headed Cowbirds.  The bird is seen here at Pruyn Sanctuary, owned by Saw Mill River Audubon.    See also:  YHBL