The ivory-billed woodpecker, once the largest woodpecker in North America at a striking 20 inches tall, has moved in and out of the extinct category, with scientists consistently unable to find solid proof for the bird to still exist.
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Afor the bird to still exist
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Bfor the bird as still existing
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Cfor the bird's continued existence
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Dthat the bird still exists
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Eof the bird and its continued existence
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