there is a black phase of mt lion. not as common as a black jaguar, but they are there. i've never seen one, but would sure get a kick out of it. i'd be afraid to shoot one tho, be sceered it'd be a black jag. guess if one was up a tree and you could study it a bit, you could tell the difference pretty quick. don't know if i've ever seen a picture of a black lion either. but i've read that the potential is there.