The Basenji dog is the only dog that is not able to bark.
4
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
Tigers can see 6 times better at night than humans.
305
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A domestic cat can sprint at about 31 miles per hour.
274
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
The world’s largest frog, the Goliath frog, can grow over 13 inches in length and can jump up to 10 feet in a single bound.
8