I want my robot to patrol my r

I want my robot to patrol my rural yard. Survival is first: solar power, northern-michigan-winter-survivability, GPS, etc. Second priority is surveillance. Living in the woods, there are all sorts of animals that may wander through my yard and garden. Video, audio, and remote control abilities will give me the chance to see (and maybe yell at) them whether I am on the couch, in bed, or across town! The "bells and whistles" will probably be, literally, bells and whistles. Lights, music, and human interaction/entertainment will be the third, "bonus" priority when (if) everything else gets up and running.