Animals Are Amazing

I thought I'd give you a few fun facts about animals.  It never ceases to amaze me, the things they do and what I don't know about them.  Here are a few facts about animals that you might not know.

1.  Houseflies always hum in the key of F.
2.  Bats are the only mammals that can fly.  (I knew that)

3.  Ostriches can run faster than horses, and the male ostrich can roar like a lion.  (I've actually seen that.)
4.  Tigers not only have stripes on their fur but also on their skin.  No two tigers ever have the same stripes.  It's kind of like fingerprints!
5.  A cat has 32 muscles in each ear.
6.  Elephants can smell water up to three miles away.  They are also one of the three mammals that undergo menopause, the others being humpback whales and human females.
7.  The koala eats only eucalyptus leaves and nothing else.
8.  There are one million ants for every human in the world.  Also, ants never sleep and do not have lungs.
9.  A snal can sleep for three years and can grow back a new eye if it loses one.
10.  Giraffes have no vocal cords so they communicate by vibrating the air around their neck.  Their tongues are blue-black in color to protect it from becoming sunburned when they eat from tall trees.
11.  Sea otters hold hands when they sleep to keep them from drifting apart.
12.  The immortal jellyfish, Turritopsis nutricula, is the only species known to live forever.