There are approximately three chickens for every human on Earth.
13
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
When dragonflies mate, their tails form a love heart.
22
Cats recognise the voice of their owner, but never evolved to care.
22
Gorillas can catch human colds and other illnesses.
205