Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
When dragonflies mate, their tails form a love heart.
22
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Parrot parents "name" their children with a signature call.
112
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18
The Basenji dog is the only dog that is not able to bark.
4