Texas Panhandle Bird Nerd

While huge flocks of blackbirds are not uncommon, particularly in agricultural settings, I was startled in early October 2019 by more than 1500 blackbirds with one thing in common--yellow heads. When I first saw this huge flock of blackbirds (a "murmuration" in birding terminology), I just assumed that they were our common red-winged blackbirds. The birds were flying away from me, so I took a few pics and watched them twist and turn like a school of fish evading a shark. Then