Squirrel populations are looking pretty good here in Central PA this year. When I moved up here 22 years ago, the only kind of squirrel you saw in any numbers were grays. During the last 5 years the fox squirrels have really appeared in numbers. Based on the areas that I gradually saw them move into, they are moving from south to north as they spread. Since I'm located at the south eastern edge of the Allegheny mountains, it means they've left the flatlands are are moving up into these hills. Even saw a black last year. Where I grew up in Western NYS, blacks were as common as grays and fox squirrels. We've mostly Oaks, Maples, Hemlock, Sweet Birch and cherry around here, with plenty of mast/food these last two years because of the rains and relatively snow free winters. Good Hunting.