How much do animals sleep?

Ever wanted to know how long humans sleep in comparison to other animals? Well, do I have the chart for you. Here is a nice look at how long some other members of the animal kingdom spend sleeping! Seems that we are on the really low end for amount of sleep. Although I wonder what the giraffe does with the other 19 hours it's awake?! Haha ...

Seriously though, if we sleep 8 hours and a lot of our sleep is our brain sorting stuff out, why do all the other animals need more sleep than us? We clearly have more s*** to sort out than the giant armadillo! So what's the deal?

Species	Average Total Sleep Time (% of 24 hr)	Average Total Sleep Time (Hours/day)
Brown Bat	82.9%	19.9 hr
Giant Armadillo	75.4%	18.1 hr
North American Opossum	75%	18 hr
Python	75%	18 hr
Owl Monkey	70.8%	17.0 hr
Human (infant)	66.7%	16 hr
Tiger	65.8%	15.8 hr
Tree shrew	65.8%	15.8 hr
Squirrel	62%	14.9 hr
Western Toad	60.8%	14.6 hr
Ferret	60.4%	14.5 hr
Three-toed Sloth	60%	14.4 hr
Golden Hamster	59.6%	14.3 hr
Platypus	58.3%	14.0 hr
Lion	56.3%	13.5 hr
Gerbil	54.4%	13.1 hr
Rat	52.4%	12.6 hr
Cat	50.6%	12.1 hr
Cheetah	50.6%	12.1 hr
Mouse	50.3%	12.1 hr
Rhesus Monkey	49.2%	11.8 hr
Rabbit	47.5%	11.4 hr
Jaguar	45%	10.8 hr
Duck	45%	10.8 hr
Dog	44.3%	10.6 hr
Bottle-nosed dolphin	43.3%	10.4 hr
Star-nosed Mole	42.9%	10.3 hr
Baboon	42.9%	10.3 hr
European Hedgehog	42.2%	10.1 hr
Squirrel Monkey	41.3%	9.9 hr
Chimpanzee	40.4%	9.7 hr
Guinea Pig	39.2%	9.4 hr
Human (adult)	33.3%	8 hr
Pig	32.6%	7.8 hr
Guppy (fish)	29.1%	7 hr
Gray Seal	25.8%	6.2 hr
Human (elderly)	22.9%	5.5 hr
Goat	22.1%	5.3 hr
Cow	16.4%	3.9 hr
Asiatic Elephant	16.4%	3.9 hr
Sheep	16%	3.8 hr
African Elephant	13.8%	3.3 hr
Donkey	13.0%	3.1 hr
Horse	12.0%	2.9 hr
Giraffe	7.9%	1.9 hr