The late afternoon sun reduced the definition and the two male Brown-headed Cowbirds appear to be one bird, with two heads!
Brown-headed cowbirds are often viewed in a negative light because of the way they make a living. Using a strategy referred to as brood parasitism – the mother lays her eggs in the nests of other birds that then raise them, sometimes after the cowbird chick has outperformed (and possibly killed) the young of the foster parents. But, they are a native species and it takes all kinds to make the world go around.
There may be a couple of red-winged blackbird females in the ranks of the cowbird flock (the birds at the upper left with the streaking on their chest.) But, they may also be juveniles – I’m not wholly familiar with this species and I have rarely seen them and never in such numbers as I captured them, yesterday just before sunset. I found it interesting that, in general, the males assumed perching positions on different branches from the females.