How does a sloth survive in the wild?

From the text:

Sleepiness and slothfulness keep it out of harm's way, away from the notice of jaguars, ocelots, harpy eagles and anacondas. A sloth's hairs shelter an algae that is brown during the dry season and green during the wet season, so the animal blends in with the surrounding moss and foliage and looks like a nest of white ants or of squirrels, or like nothing at all but part of a tree. The three-toed sloth lives a peaceful, vegetarian life in perfect harmony with its environment.