Dolphins have names for one another.
18
A group of kittens is called a "kindle".
10
A group of unicorns is called a blessing.
304
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
A puppy is born blind, deaf, and toothless.
16