De-extinction and reintroduction – What’s the difference?

From Fauna-Flora.org:

The term ‘de-extinction’ has been hitting the headlines. The dire wolf – extinct for over 13,000 years – has apparently been brought back from the dead, with the woolly mammoth set to follow. At first sight, de-extinction may appear to be just an extreme example of species reintroduction, a common practice in conservation that literally involves putting a native species back where it belongs.

They are far from the same thing, however, and it’s important not to confuse the two concepts. So, what are the differences?

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