Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
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
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
A group of pugs is called a grumble.
10
Cats and dogs can hear ultrasound.
350
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Camels and llamas can cross breed. The offspring is called a ‘Cama’.
10