The Basenji dog is the only dog that is not able to bark.
4
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
The reindeer is the only mammal that can see UV light.
17
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Tigers, leopards, and jaguars love "Calvin Klein's Obsession for Men". The scent is used to attract animals to cameras in the wilderness, and was even a turn on for one pair of Jaguars who were subject to it.
17
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19