Sorry to bump my old thread but I saw a program called 'Infested' on Animal Planet tonight and one of the stories was about a family that purchased a home and were seeing dozens of garters a day and then one day the husband went under the crawl space under the house and discovered hundreds of them! It was a Hibernaculum.(new word to me)

Anyway this is all very fascinating to me. I know I don't have a 'Hibernaculum' on my property because I never saw dozens in a day but I am now convinced there is one near by here!