Dolphins have names for one another.
18
The reindeer is the only mammal that can see UV light.
17
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Cats recognise the voice of their owner, but never evolved to care.
22
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Two dogs were among the Titanic survivors.
262
Lobsters have blue blood.
476