Morning observations
The aggression radius of squirrels is about 7 feet. I know this because Plagioclase dumped a bunch of seed along a long arc (as he is wont to do), and five squirrels are more-or-less equally spaced along it, munching away happily, until one strays too close to his neighbor, then the chase ensues.
(caveats: Squirrels in our backyard who happen to like the taste of old sunflower seeds and eat in the morning after it’s snowed a couple of inches. In January.)