During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
The Basenji dog is the only dog that is not able to bark.
4
Cats recognise the voice of their owner, but never evolved to care.
22
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
Cats and dogs can hear ultrasound.
350
The seahorse is the only fish to have a neck.
12