They live in the tropics of South America. If you could see one, you might be amazed by the deliberate way a sloth moves its limbs, almost as if it's moving in slow motion. These hunters usually detect their prey when it moves against its background. So they're less visible to predators. What's more, sloths have a unique form of camouflage.
Most mammals have relatively smooth hair, but the hair of a sloth is pitted or grooved.