A species of huge, flightless bird that once inhabited New Zealand disappeared around 600 years ago, shortly after human settlers first arrived on the country’s two main islands. Now, a Texas-based biotech company says it has a plan to bring it back.

A de-extinction company plans to recreate the giant moa bird, but scientists question the ethics and scientific accuracy of the effort.

“Some of those iconic species that feature in our tribal mythology, our storytelling, are very near and dear to us,” says Ngāi Tahu archaeologist Kyle Davis, who is working on the moa de-extinction project. “Participation in scientific research, species management, and conservation has been a large part of our activities.”