The echidna or spiny ant-eater, a genus of Australian toothless mammals, in size and general appearance resembling a large hedgehog, excepting that the spines are longer, and the muzzle is long and slender, with a small opening at the end through which a long, flexible tongue can be thrust. The echidna sleep during the day.
It has short, strong legs and its five toes are armed with powerful claws so that it can burrow easily in the ground. It feeds upon ants and other insects, which it catches with its long, sticky tongue. It is nearly allied to the oraithorhynchus or duckbill, and the two form a peculiar class of animals, having in their structure some of the peculiarities that mark mammals, birds and reptiles.
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