It is one of the only mammals in the world to lay eggs. Measuring on average 35 centimeters, the echidna is a small animal that lives in Australia and New Guinea. Nicknamed the spiked anteater, it has no connection with the anteaters found in South America. The echidna is the close relative of the platypus. Excellent swimmer, it feeds mainly on ants and termites. To feed, it uses electrical sensors present on its muzzle thanks to which it detects the slightest movement. There are two types of echidna: the short-beaked echidna and the long-beaked echidna The latter lives in New Guinea and has almost disappeared due to intensive hunting.