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
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
Cats recognise the voice of their owner, but never evolved to care.
22
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
A dork is a whale's penis.
327
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11