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Echidna

life science Maturity 7-9 Next article →

Echidnas are very special mammals known as monotremes. Most mammals give birth to live babies, but monotremes lay eggs.

Echidna, Exmouth
Echidna, Exmouth

Along with the platypus, echidnas are the only living egg-laying mammals. They are also called spiny anteaters because of how they look. These animals live in Australia and New Guinea. They can be found in many places, from snowy mountains to dry deserts.

EchidnainCanberra
EchidnainCanberra

They are quite important to study because they are a unique part of nature.

To find food, the echidna uses a very special snout. This snout acts as both a nose and a mouth.

Echidna skeleton
Echidna skeleton

Some species have electrosensors in their snouts to find prey. These sensors help them detect the tiny electrical signals of living things. The long-beaked echidna has about 2,000 of these sensors. The short-beaked echidna has fewer than 400 at the tip of its snout. Once they find ants, termites, or worms, they use a long, sticky tongue. Since they have no teeth, they grind food against the bottom of their mouths.

Scientists believe echidnas evolved a long time ago. They likely appeared between 20 and 50 million years ago.

Echidna skeleton
Echidna skeleton

They probably descended from an ancestor that lived in the water, much like a platypus. This ancestor was likely amphibious, meaning it could live on land and in water. Over many millions of years, they changed to live mostly on land. This move to land put them in competition with marsupials. Some experts think they might have originally evolved in New Guinea before moving to Australia.

There are four different species of echidna alive today. Three of these are long-beaked species found in New Guinea.

Long-beakedEchidna
Long-beakedEchidna

These are part of the Zaglossus genus. The Western long-beaked echidna lives in highland forests. There is also Sir David's long-beaked echidna and the Eastern long-beaked echidna. The fourth species is the short-beaked echidna, which lives in Australia.

This species is smaller and has longer hair than the others.

Echidnas have many ways to stay safe and healthy. Their bodies are covered in spines made of keratin.

Onkapringa River NP echidna spines P1000601
Onkapringa River NP echidna spines P1000601

This is the same protein found in your own hair and nails. When they are scared, they curl into a ball or dig deep into the ground. They use strong limbs and large claws to be powerful diggers. Their babies are called puggles. A mother lays one soft, leathery egg in her pouch. The puggle stays in the pouch for about 45 to 55 days until it grows spines.

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🖼️ Images & Media (6)
File:Onkapringa River NP echidna spines P1000601.jpg
Onkapringa River NP echidna spines P1000601.jpg
French Island Echidna.ogg
File:Echidna skeleton.jpg
Echidna skeleton.jpg
File:Long-beakedEchidna.jpg
Long-beakedEchidna.jpg
File:EchidnainCanberra.JPG
EchidnainCanberra.JPG
File:Echidna, Exmouth.jpg
Echidna, Exmouth.jpg
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