Poison Frogs...

... are one of Annie Davidson's passions, and cool evolution one of our Querencia's favorite subjects. Here is alink to a story on two widely separated groups of these beautiful, deadly, and inoffensive creatures. It seems that not only do they extract their toxins from their food, in this case ants; two unrelated groups have "learned" to do so.

"Because neither the frogs nor the ants from the two regions are closely related, the results indicate that the ability to utilize ants both as food and as the source of a defense weapon against danger developed independently in two diverse regions of the world".