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Arguably, the echidna's most important adaptation is its long, sticky tongue. It uses its tongue to catch the termites on which it feeds, and without this ability to lick up hundreds to thousands of termites in a feeding session, it would starve.

While its sharp spines are clearly necessary for its defence, such protection would be pointless if it starved to death. Similiarly, its sharp claws for quickly burrowing are important for survival against predators, but if it could eat no food, it would stand even less chance of survival.

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10y ago

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