Only 3% of bird species have penises.
0
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
Sheep, goats, octopuses, and toads have rectangular pupils.
7
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293