First sunny warm day in a long time here in Upstate NY, and the grater snakes are becoming active. Had five young ones (eastern) in my sunroom this morning. There is a tiny hole between the block wall and the insulation and they come in (and go out) from underneath the thermal slab. We have a few dozen that winter den under there every year. It seems to be a perfect place. Fond a "blue" one last year, I'll try to post a picture.