Ha, this video is kinda old already, but I still thought I'd share it, and what it is, is simply a lioness going Animal Planet ape-shit on a bird that made the mistake of entering their den.
I love the people filming it's reaction, as if the lioness did something WRONG. It's a frikken Lion, it eats animals! Lol. Sad for the bird, but hey, I'd rather have the lion mauling a bird than mauling a human!!