There are many different types of sloths. Some have dated back all the way to the ice age. The two types of sloth I will talk about are 3 toed and 2 toed sloth.
The 3 toed sloth is a sloth that mainly lives in trees. They are found in north and central America. They are herbivores so they do not eat meat. They have 3 long towes on each foot so 12 toes. They range from lots of different types of colors. There are 4 different types of 3 towed sloths the Maned, Pale throated, Brown throated and the Pygmy. Sloths like to swim, they can swim 3 times faster that they can walk on land.
The 2 toed sloth is hardly any different than the 3 toed sloth excepet the have 2 toes on there hands and 3 on there feet so 10 toes. There is 2 different types of 2 toed sloths the Linnaeus and the Hoffman. The 2 toed sloths will defend themselves if field harmful.
http://animals.nationalgeographic.com/animals/mammals/three-toed-sloth/
http://animals.nationalgeographic.com/animals/mammals/two-toed-sloth/
http://nationalzoo.si.edu/Animals/SmallMammals/fact-sloth.cfm