Oreophrynella nigra, or the Pebble Toad, is a species of toad native to Venezuela. It lives atop flat, mesa-like
mountains called tepui, which rise above the rainforest canopy. Here, isolated from life in the forest below,
the pebble toad has developed a rocky, grey camouflage and a remarkable method of evasion. When a predator
approaches, the toad curls up into a ball and dives down any nearby hill to escape.
It is a beautiful example of microevolution and local adaptation.