The Barred Owl went after one set of squirrels before going after another set without success. Late twilight seems to offer this owl an opportunity to go to various squirrel cavities just after fly out. Tonight it was two cavities, one near the roost site and one a few blocks north. The alarm calls of the squirrels only peaked the owls interest in going after them.
It's interesting to see the variety of behavior after fly out. Sometimes it is a neighborhood patrol to see where raptors have roosted, other items it going to cavities likely to have birds like Tufted Titmouse or squirrels, and other times it hunts things on the ground. I was hoping to learn some behavioral patterns after fly out, but it seems the behavior changes every night.