When a cougar is reported in a neighborhood we will usually investigate if there is enough information and it is timely enough. Usually, cougars do not pose a threat when they are just passing through. However, if they are repeatedly seen in a residential area or have killed pets or livestock, then we become involved. However, something large on a roof could be anything including house cats, raccoons, or even a Halloween reveler throwing something. If you see tracks or sign or actually see a cougar, please let us know. Thank you.