BobM said:
Dave, when I first moved in to bamber my front porch was red brick and it had some holes in the morter. Rough green snakes (more than 1) lived in there (there was a hollow in the dirt below the brick) for about 5 years. Then my wife started having nightmares about them. In the nightmares she could see them curled up inbetween the windows and screens, trying to get in.
I used to see them in the bushes of my front yard as a common ocurrence. Very cool. Alas, I had to bite the bullet. When I destroyed the porch I caught and released at least 2 of them into the woods across Lacey Road.
Interesting. Your observation suggests to me that your "domestic" rough greens had simply found a friendly habitat with an adequate food supply to sustain them that happened to be in the immediate vicinity of adequate hibernation quarters. It would seems that for individuals of many snake species their site chosen for hibernation is arrived at by chance, rather than by some purposeful hibernacular territorial imperative (God - do I have a way with pompous words, or WHAT?)
Anyway, I'd really like to know why some rattler species (timbers, prairies) consistently use communal hibernacula, and other species living in the same range as the communal hibernators do not - and why the Copperhead (genus Ancistrodon/Agkistyrodon) is, over much of its range, a communal denner, and the Cottonmouth (same genus) is not. And why one old pilot blacksnake (Elaphe obsoleta) in Mianus Gorge, NY hibernated for at least five years in a copperhead den in a granite talus slope. I marked him the first time I caught him, kept him over the winter, and released him at the den the next spring - and re-caught him each of four succeeding springs when I found him sunning within a five-foot radius of the same boulder at the den. I caught other pilot blacks in and near the Gorge, but never found another at the den site. Black racers and milk snakes also used the den. It would seem there's more to it than merely the local availability of a physically suitable potential denning site.
Isn't it amazing about how much of the biology of our fellow creatures (not to mention of our own species) we remain so massively ignorant?
Dave