Great picture and great bird. These dapper fellows are all over the place where I live, though I didn't know they were quite this abundant:
The red-winged blackbird (Agelaius phoeniceus) is a passerine bird of the family Icteridae
found in most of North America and much of Central America. It breeds from Alaska and
Newfoundland south to Florida, the Gulf of Mexico, Mexico, and Guatemala, with isolated
populations in western El Salvador, northwestern Honduras, and northwestern Costa
Rica. It may winter as far north as Pennsylvania and British Columbia, but northern
populations are generally migratory, moving south to Mexico and the Southern United States.
Claims have been made that it is the most abundant living land bird in North America,
as bird-counting censuses of wintering red-winged blackbirds sometimes show that
loose flocks can number in excess of a million birds per flock and the full number of
breeding pairs across North and Central America may exceed 250 million in peak years.