The platypus lives in rivers and lakes in eastern Australia. During the day it sleeps in a hole at the edge of the water. It rises at dusk and dives into the water to look for food.
The platypus is a fantastic swimmer. It has a big flat tail, webbed front feet, and waterproof fur. While diving the animal shuts its eyes, nose and ears completely and can stay underwater for up to 10 minutes.
A carnivore, the strange mammal eats shrimp, crayfish and other creatures that live on the bottom of the river. Occasionally it also feeds on frogs, fish or insects.
Its special sensors enable it to hunt underwater and in the dark. When living creatures move, their muscles generate electricity. The platypus has special organs that can sense this.
It can also feel changes in water pressure. Using the two senses together, the platypus can sense something move and swoop to catch it.
The animal is unusual in other ways, too. Although it is a mammal, it doesn't give birth to live young. Rather, it lays eggs just like birds.