Feeding on crustacean (crab or crayfish). In corner of old concrete stock tank with no outlet — prey may have been caught and unable to climb out.
Drama. These guys all normally get along pretty well, but here a squirrel decided to start something and nearly got kicked in the head as reward. Moments later they were back to munching sunflower seeds side-by-side again.
Vigorous fight between hawk & crow. First the hawk had the upper hand, then the crow. The hawk eventually escaped under a fence. I am guessing sharp-shinned because of Sibley description of breast streaks as "coarse brown" rather than "thin dark" for Cooper's. Also the hawk is smaller than the crow (while a Cooper's is supposed to be about crow-sized), and its head looks rounded (more like SS).