Elephant
Elephants are the only mammals that cannot jump, and they can hear with their feet.
Crow
Crows can recognise individual human faces, remember them for years and tell other crows about them.
Bee
Honey bees tell each other where flowers are by dancing, and the dance includes the angle of the Sun.
Ant
There are thought to be about 20 quadrillion ants on Earth, around 2.5 million for every person.
Tardigrade
The tardigrade is half a millimetre long and has survived being left in open space.
Sloth
A sloth moves so slowly that algae grows in its fur, which the sloth regards as company.
Platypus
The platypus lays eggs, has a venomous spur and glows under UV light, and was first suspected of being a hoax.
Mantis shrimp
The mantis shrimp punches about as fast as a small bullet, boiling the water around its fist.
Koala
Koalas have fingerprints so like ours that even under a microscope they are hard to tell apart.
Jellyfish
Jellyfish have no brain, heart or bones, and one species can turn itself back into a baby.