Though we now enjoy mountain lion mania, it used to be "black panthers," which of course were fisher. Never heard of a black color phase of mountain lions like leopards or jaguars, which probably would not fare well at 20 below zero. The power of suggestion is an illness. Years ago when we had an escaped African Serval Cat on the property next to us. It ended up in the news. People 60 miles north and 50 miles south swear they had seen it. We got almost simultaneous accounts of sightings 100 miles apart. Perhaps he took the bus. The cat never left the property. We caught it less than 300 yards from out house.