This video says about itself:
12 July 2010
The Music of Nature proudly presents “Red-winged Blackbird,” a delicious video portrait of a male in full song. The Red-winged Blackbird is common across North America, breeding in marshes and meadows. Excited males puff out their red epaulets (shoulder pads) as they sing.
From eNature blog in the USA:
Why Does The Cold Make Blackbirds Gather In Large Flocks?
Posted on Tuesday, February 04, 2014 by eNature
The old saying, “Birds of a feather flock together,” is particularly true among blackbirds in winter.
Though many birds band together during winter, none are as notorious for their flocking behavior as blackbirds, including red-winged blackbirds, European starlings, common grackles and brown-headed cowbirds.
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