I saw that movie , The Killer Shrews (1959)
I suspect they have the genetic material of this “lost” animal.
I’ve read some rather detailed descriptions of how they plan to bring back the woolly mammoth, and it involves using DNA and a host carrier.
We are on the verge of being able to do this sort of thing, so these animals should not be lost forever, that is if they really cared about them as much as they act like they did.
As for global warming, these folks are nimrods of the highest order.