Le cassenoix de Clark : à la prochaine brindille tournez à droite

How does one stand the cold? Male penguins gather in groups to maintain their body heat.

This twelve-centimetre male fish is capable of carving perfectly symmetrical rosettes on the ocean floor to attract females.

The boxer crab holds sea anemones in each claw. This is its way of catching prey and scaring off predators.

When danger approaches, instead of hiding in the foliage, the Jesus Christ lizard jumps into the river and runs on the water.

We know the chameleon for his color changes. But that's not its only talent. It's also a formidable hunter. Few insects can escape its tongue, which unfurls in 20 milliseconds.

Once the stuff of legend, the narwhal's tusk has now revealed its secrets. This huge tooth is in fact a hydrodynamic sensor, capable of providing the narwhal with everything it needs in real time to migrate to the richest waters.

It has a duck's beak, a beaver's tail, webbed feet, venom and is one of the few mammals that lays eggs. The platypus hunts underwater without seeing or hearing.

When immortal jellyfish run out of food or become too old, they are able to reverse the aging process.

The spider has a mini spinning factory in its abdomen.

This little gastropod, also known as the sea sheep, can photosynthesize. This is very useful for storing food.

When the bee starts dancing, it's to show the other bees the way to find the pollen. The bee's body language explains it all.

Thanks to its highly-developed syrinx, the equivalent of our vocal cords, the male lyrebird assesses the potential of females.

The duck floats, has a triple layer of feathers and a secret oil that makes it completely waterproof.

When the pangolin curls up on itself, its highly supple body and super-powered muscles enable it to form a perfect ball to protect itself from predators.