SLOTHS - Tree-Dwellers

Ever have trouble getting up for school in the morning? Well, it's a good thing sloths don't have to go to school. They'd never make it on time. These drowsy tree-dwellers sleep up to 20 hours a day! And even when they are awake, they barely move at all. In fact, they're so incredibly sluggish, algae actually grows on their fur which helps them to blend in with the green leaves of the trees.
Sloths live in the tropical forests of Central and South America. They have got long arms and fur, and look like monkeys, but they are actually related to armadillos and anteaters. They can be 0.6 to 0.8 metres long and weigh from 3.6 to 7.7 kilograms.
There are two main species of sloth, identified by whether they have two or three claws on their front feet. The two species are quite similar with roundish heads, sad-looking eyes, tiny ears, and very short tails. Two-toed sloths are generally bigger and tend to spend more time than hanging upside-down than their three-toed cousins. Three-toed sloths look like they're always smiling. They also have two extra neck vertebrae that allow them to turn their heads almost all the way around!
Some scientists think sloths developed their slow-motion lifestyle so they would be less noticeable to predators such as hawks and cats, which rely heavily on their eyesight when hunting.