Three-toed sloth, Costa Rica - Truth be told, the three-toed sloth strikes this "aww"-inspiring pose often, since it spends most of its life clinging to tree trunks or hanging in the canopy of the tropical rainforest. But unlike the two-toed sloth, the three-toed variety can swim if necessary. Perhaps it’s that time in the water that causes algae to grow in its fur. That’s right, the three-toed sloth is so laid-back, algae take root in its hair. The algae acts as camouflage for the sloth.