Sloths live most of their life in the trees -- mating, birthing and even dying up there.
20. Sloth —
Sloths live most of their life in the trees -- mating, birthing and even dying up there.
Peter Macdiarmid/Getty Images
XXS: The baby pygmy hippopotamus.
19. Pygmy hippopotamus —
XXS: The baby pygmy hippopotamus.
AFP/Getty Images
This little loris, it seems, went to the hospital.
18. Slow loris —
This little loris, it seems, went to the hospital.
Matt Cardy/Getty Images
Chameleons are blessed with a permanent "not bad" expression.
17. Chameleon —
Chameleons are blessed with a permanent "not bad" expression.
Ian Walie/Getty Images
No meerkat is ever accused of bad posture.
16. Meerkat —
No meerkat is ever accused of bad posture.
patrik stollarz/AFP/Getty Images
The koala's enduring popularity proves that, as with most of our infatuations, good looks can blind us to severe personality flaws.
15. Koala —
The koala's enduring popularity proves that, as with most of our infatuations, good looks can blind us to severe personality flaws.
DPA/Getty Images
Gentoo penguins in discussion.
14. Penguin —
Gentoo penguins in discussion.
AFP/Getty Images
"If only my arms were a bit longer, I could make that branch!"
13. Red panda —
"If only my arms were a bit longer, I could make that branch!"
STR/AFP/Getty Images
It even has a party trick -- air rings.
12. Beluga whale —
It even has a party trick -- air rings.
Kazuhiro Nogi/AFP/Getty Images
"Oh, hi there. I was just having lunch in my anemone. I'd invite you in, but..."
11. Clown fish —
"Oh, hi there. I was just having lunch in my anemone. I'd invite you in, but..."
Sam Yeh/AFP/Getty Images
Chinchillas aren't morning rodents, perhaps accounting for the shy, downcast eyes. (Body-to-paw ratio: Cute)
10. Chinchilla —
Chinchillas aren't morning rodents, perhaps accounting for the shy, downcast eyes. (Body-to-paw ratio: Cute)
courtesy Jaime E. Jimenez
One character Disney didn't need to cute up too much.
9. Roe deer —
One character Disney didn't need to cute up too much.
Dieter Nagl/Getty Images
Believe it or not -- that's the face of a predator.
8. Bottlenose dolphin —
Believe it or not -- that's the face of a predator.
Roland Weihrauch/DPA/Getty Images
The animal kingdom's answer to the Biebs -- the cuteness is all in the hair.
7. Alpaca —
The animal kingdom's answer to the Biebs -- the cuteness is all in the hair.
Christopher Furlong/Getty Images
A bird that's the size of most other birds' meals.
6. Bee hummingbird —
A bird that's the size of most other birds' meals.
Ronaldo Schemidt/AFP/Getty Images
If you can look cute while eating, you know you're winning.
5. Sea otter —
If you can look cute while eating, you know you're winning.
Robert Giroux/Getty Images Sport
So cute, all it needs is a head.
4. Harp seal —
So cute, all it needs is a head.
Joe Raedle/Getty Images
Undeniably adorable -- unless you're a bamboo tree.
3. Giant panda —
Undeniably adorable -- unless you're a bamboo tree.
Alain Jocard/Getty Images
What they lack in size, they make up in cute.
2. Philippine tarsier —
What they lack in size, they make up in cute.
Joel Nito/AFP/Getty Imges
World's least scary Cerberus.
1. Fennec fox —
World's least scary Cerberus.
Junko Kimura/Getty Images