Baks the blind boxer has a seeing eye goose named Buttons; a four-year-old goose who leads the pup around everywhere either by hanging onto him with her neck, or by honking to tell him which way to go.
16
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
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Cats and dogs can hear ultrasound.
350
The Basenji dog is the only dog that is not able to bark.
4
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
Denmark has twice as many pigs as there are people.
66