What is a pebble frog?

A pebble frog is a frog that lives up high in the Peruvian mountains. Its only predator at that height is a spider. When it sees this spider it tenses up and falls down the mountain like a little pebble. It does not hurt itself because it is less than an inch long and it weighs less than a paper clip so it is not harmed. I camouflages with the rocks in its habitat quite well too. google it there are some really great videos on this amazing frog.