I'm sure there's probably a colony somewhere around me. My neighbors have fruit trees and the neighbor next to me has the set for Survivor in his backyard corner. My husband had to tell him not to throw his old carpet in the corner of his yard because we didn't want rats. I haven't seen any but then again I'm not out lurking around in the backyard after dark. Maybe I should. I know we have an armadillo and a possum and some racoons it only makes sense that ratus ratus would be there too.