The Basenji dog is the only dog that is not able to bark.
4
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
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
23
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
-12
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9