Single-perforate, exotic egg-laying mammals, the following five species of monoporosis live in Australia and the island of New Guinea.
Platypus:
When platypus were first discovered, scientists thought their strange appearance might be a big joke. These star animals from Australia are also the only mammals in existence that secrete venom.
Western long-beaked echidna:
Native to the island of New Guinea, the western echidna is the largest single-perforon animal in the world. Due to human hunting and indiscriminate logging, the western echidna is now classified as a critically endangered species.
Sir david's long-beaked echidna:
The Name of the David Longnose Echidna is derived from the explorer David Attenborough, which is covered in thorns and lives only on the Cyclops Mountains on the Indonesian island of Papua.
Eastern long-beaked echidna:
Although the Eastern Longnose Echidna is a close relative of the Western Longnose Echidna and David Longnose Echidna, there are still slight differences between them: the Eastern Longnose Echidna has five fingers on its paws, while the Western species have only three or four fingers.
Short-beaked echidna:
The alligator is only found in Australia. They are sometimes referred to as stinging anteaters, but the alligator has little to do with anteaters living in Central and South America. (Some pictures from the Internet)