No the Moa isn’t returning

Professor Jerry Coyne writes:

Attempts to bring back extinct species are scientifically misguided and mis-reported by the press. He says that the press distorts what has been achieved scientifically, and pretends that an animal with only a few cosmetic gene edits is identical to an extinct species.

Changing a living species by editing a few genes to get something that looks like the extinct creature is not the same thing as re-creating the extinct creature. Professor Coyne tells us that extinct species embodied thousands of genetic differences from related modern species, including genes that affect metabolism and behavior. Control regions of genes, which lie outside protein-coding regions, are involved in differences between extinct species and their relatives, but we do not know where these regions are and so cannot use them for genetic editing.

Basically an Ostrich that looks a bit like a moa, is not a moa. It is just a genetically edited ostrich.