The Basenji dog is the only dog that is not able to bark.
4
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Cats and dogs can hear ultrasound.
350
A puppy is born blind, deaf, and toothless.
16
Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
156