Which animal spends its life upside-down?

In contrast to the acrobatic antics of the monkeys and apes, sloths move about the tree tops in very slow motion. They hang underneath the branches from hooked claws of both the fingers and toes, and spend most of their lives in this upside down position. They eat, sleep, mate and even give birth to their young upside down. There are two interesting features of a sloth related to its upside down way of life. The first is its ability to turn its head almost right round to compensate for its reversed position. The second is the way its hair lies in the opposite direction to that of most animals. The sloth’s hair runs from its belly round to its back, and this ensures that heavy tropical showers run straight off.