Panama's jungles are home to three of the six species of sloth-one of which, the pygmy three-toed sloth, is endangered. The other two species are the brown-throated sloth and Hoffman's two-toed sloth.

This pygmy three-toed sloth lives the ultimate life of leisure. He spends most of his time hanging upside down in the red mangrove forests on the island of Escudo, off the coast of Panama.

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.

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 ...