25 Housefly Musca domestica
Houseflies don’t allow their short lifespans (14 days) to hinder their musical abilities. They always hum in the key of F.
24 Ostrich Struthio camelus
Ostriches can run faster than horses, and the male ostriches can roar like lions.
23 Bat Chiroptera
Bats are the only mammals that can fly, but wouldn’t it be awesome if humans could fly too?
22 Kangaroo
Kangaroos use their tails for balance, so if you lift a kangaroo’s tail off the ground, it can’t hop.
21 Spider Araneae
On average, there are 50,000 spiders per acre in green areas. Bet you’ll think twice before going outside now – unless you’re this guy.
20 Tiger
Tigers not only have stripes on their fur, they also have them on their skin. No two tigers ever have the same stripes.
19 Crocodile Crocodylinae
Here’s a tidbit that might be useful if you plan on becoming the next Steve Irwin: To escape the grip of a crocodile’s jaw, push your thumb into its eyeball – It will let you go instantly.
18 Flea
Here’s a tidbit that might be useful if you plan on becoming the next Steve Irwin: To escape the grip of a crocodile’s jaw, push your thumb into its eyeball – It will let you go instantly.
17 Cat
A cat has 32 muscles in each ear. All the better for them to eavesdrop on your conversations and plot your demise.
16 Elephant
Elephants can smell water up to 3 miles away. They are also one of the three mammals that undergo menopause – the other two being humpback whales and human females.
15 Koala
Koala bears almost exclusively eat only eucalyptus leaves and nothing else.
14 Beaver
Because beavers’ teeth never stop growing, they must constantly gnaw on objects to keep them at a manageable length. Their teeth would eventually grow into their brain if they didn’t maintain them.
13 Ant
Beware an ant uprising! There are one million ants for every human in the world. These resilient creatures also never sleep and do not have lungs.
12 Oyster
Oysters can change gender depending on which is best for mating. Talk about successful adaptation.
11 Butterfly
Butterflies have two compound eyes consisting of thousands of lenses, yet they can only see the colors red, green and yellow.
10 Snail
Don’t try this at home, but a snail can grow back a new eye if it loses one.
9 Turtle
You can tell a turtle’s gender by the noise it makes. Males grunt and females hiss.
8 Giraffe
Giraffes have no vocal cords and their tongues are blue-black in color.
7 Squirrel
You might want to thank a squirrel the next time you enjoy the shade of a tree. Millions of trees are accidentally planted by squirrels that bury nuts and then forget where they hid them.
6 Humpback Whale
Humpback whales create the loudest sound of any living creature. And you thought the loudest sound came from that two-year-old you sat next to on your trans-continental flight, didn’t you?
5 Dog
Dogs’ nose prints are as unique as human fingerprints and can be used to identify them.
4 Seahorse
The slowest fish is the seahorse, which moves along at about 0.01 mph.
3 Pig
Pigs communicate constantly with one another; more than 20 vocalizations have been identified that pigs use in different situations, from wooing mates to saying, “I’m hungry!”
2 Poodle
Contrary to popular belief, French poodles actually originated in Germany. Maybe you should’ve named her Gretl instead of Fifi.
1 Hummingbird
Hummingbirds are the only birds that can fly backwards and their wings can beat at up to 80 times per second.
source:http://list25.com/25-amazing-facts-you-didnt-know-about-animals/
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