You've Never Heard of These Weird and Wild Animals

Mexican Soft Salamander

Most notably, this salamander has the ability to regenerate entire appendages instead of just scarring.

Penguins used to be 6 feet tall.
Cows have very complex friendships, and when they are isolated from their companions, they experience separation anxiety.
Cats have over one hundred vocal sounds, while dogs only have about ten.
Killer whales are not whales at all, rather a species of dolphin.