There's just not the squirrels in South East Michigan that there was in the 70s and 80's my brothers and I opening week back then would get are 5 squirrel limit in minutes we would bring a couple friends that couldn't shoot or had iron sight and shoot there limit for them....the woods haven't changed all the oaks are over 200 years old....
The only and biggest change is a lot more hawk's, owls and there were no coyotes at all back then....