How about bringing back something we recently made extinct, like the Carolina Parakeet? Or the Tasmanian Devil? And preserving those that are on the brink of extinction? Bringing back the mammoth might have consequences that are not beneficial to the environment as it is today.
So why bother trying to save the Delta Smelt, when you could just bring it back?
Tasmanian Devil is not extinct.
The Tasmanian Tiger (thylacine) is.............