I've got one to. My mystery animal finally showed itself now that it has gotten cooler and I have been out there closer to dark. Would you let one stick around for a while if it was living in a big pile of dirt instead of the dam? It sure is cleaning up some of my pond vegetation problems, and since it is not living in the dam. . . Unless they make multiple dens? I think it took to the pile instead of the dam because of the lack of roots in the pile versus my extremely brushy dam. I was thinking I could let it stick around until early summer, or later if it does not breed.