Cats and dogs can hear ultrasound.
350
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
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