Also there was the addition of overhead electric and telephone wires. In areas where tree are far apart, there can be constant squirrel traffic on the wires.
I shot a squirrel the other day because I was on my roof trying to rip a hole in the eaves to make a winter nest in the attic. The recent cold weather has sent them into a frenzy of trying to rip their way into houses on our street. I hit this one from about 45 feet with 8 pumps on a Crossman b-b gun, which is strong enough to penetrate 10 layers of cardboard box.
