"It's like something out of an animal horror movie -- killer frogs take over peaceful pond, then after terrorizing and eating everything alive, start eating each other.

Only it's no movie. It's really happening in Golden Gate Park's Lily Pond, near the California Academy of Sciences. And after watching the frogs chew through everything in sight over the past several years, the city finally wants to do something about it.

No one knows for sure when the African clawed frogs got into the pond or who put them there. But there they are, and the Toad Warriors have pretty much taken care of the native turtles, frogs and fish."

Link.