Echidnas
Echidnas sometimes known as spiny anteaters, belong to the family Tachyglossidae in the monotreme order of egg-laying mammals. The four extant species, together with the platypus, are the only surviving members of that order and are the only extant mammals that lay eggs.Their diet consists of ants and termites, but they are not closely related to the true anteaters of the Americas. They live in Australia and New Guinea.
Echidnas evidently evolved between 20 and 50 million years ago, descending from a platypus-like monotreme.This ancestor was aquatic, but echidnas adapted to life on land.
Echidnas are medium-sized, solitary mammals covered with coarse hair and spines.Superficially, they resemble the anteaters of South America and other spiny mammals such as hedgehogs and porcupines. They are usually black or brown in colour. There have been several reports of albino echidnas, their eyes pink and their spines white.They have elongated and slender snouts that function as both mouth and nose. Like the platypus, they are equipped with electrosensors, but while the platypus has 40,000 electroreceptors on its bill, the long-billed echidna has only 2,000, and the short-billed echidna, which lives in a drier environment, has no more than 400 located at the tip of its snout.[6] They have very short, strong limbs with large claws, and are powerful diggers. Echidnas have tiny mouths and toothless jaws. The echidna feeds by tearing open soft logs, anthills and the like, and using its long, sticky tongue, which protrudes from its snout, to collect prey.
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