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The animal doesn't necessarily have to be "missing" however the numbers will be scarce and its habitat affected by either natural or human activity for the species to be considered endangered. For the species to be considered extinct, there would have to be no more evidence to prove the animal's existance.

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14y ago
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Q: How many years must an animal be missing to be consider endangered or extinct?
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Endangered and extinct animals are similar because endangered animals sometimes become extinct.


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