Echidnas

Echidnas, also known as spiny anteaters, are four extant mammal species belonging to the Tachyglossidae family of the monotremes, an order of egg laying mammals. Together with the Platypus, they are the only surviving members of that order comprising the only extant mammals that lay eggs. The echidnas are named after a monster in ancient Greek mythology.

echidna
Image source: generousbeginnings.com

More info: en.wikipedia.org

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