Defecating exposes sloths to predators on the jungle floor. An unexpected ally benefits, and returns the favor. A brown-throated three-toed sloth peers over a tree's buttress root while defecating ...

Sloth (Pygmy Three-Toed) Credit: Getty Images The pygmy three-toed sloth, found only on a tiny island off Panama, is one of the smallest and most endangered sloth species.