lt dan, squirrel hunting has been an important hunting endeavor since this country began. Out in the boonies, you have quite a game between the hunter and the squirrel. Squirrels keep tree limbs between themselves and hunters. So, the hunter has to figure out "squirrel psychology" or else use a trained squirrel dog.
Sit down. Be very still. Make a few squirrel noises, to see if Bushytail sticks a head up to look. Or, just have the patience to be very still for long enough that the squirrel forgets that the hunter is anywhere near.
A trained little dog will go to the opposite side of the tree from the hunter, where the squirrel is doing the out-of-sight thing with the hunter. The squirrel then forgets about the hunter, and goes around the tree from the dog. That's an "Oops!" mistake.
Squirrel hunting can also make a person a pretty good shot on a running critter, for that matter. Might be tree-to-tree, or might be ground-to-tree.