A Giant Moa Egg Spent 60 Years in an American Collection, Now It’s Going Home to New Zealand

Every museum treasure has a chain of custody; the paper trail of who found it, who held it, and how it ended up where it sits. For one of the rarest bird eggs on Earth, that chain broke in the 1960s, when it left New Zealand for a private collection in the United States. On Monday, Colossal Biosciences, the Dallas-based de-extinction company, announced it bought the giant moa egg at auction for one reason: to send it home. The egg will return to Aotearoa, New Zealand, where Ngāi Tahu, the Māori tribe whose ancestors lived alongside the giant birds, will care for it.

The moa was certainly no ordinary bird by any stretch of the imagination. Nine species once roamed New Zealand, and the largest, the South Island giant moa, stood up to 12 feet tall with its neck outstretched and weighed about 500 pounds. All of them were gone roughly 600 years ago, within two centuries of the first human settlers’ arrival. Auction records show this egg was found on January 14, 1966. Colossal bought it from Artemis Gallery in Louisville, Colorado, on June 12. Its rarity is hard to overstate: fewer than 40 sufficiently complete moa eggs are known in public collections worldwide, and only eight retain at least 90 percent of their original shell. This one measures roughly 22 by 17 centimeters, nearly double the volume of an ostrich egg, with a shell thinner than two millimeters. It will travel by private flight and be presented to Professor Te Maire Tau, a Ngāi Tahu leader and historian, at a ceremony in December.

This isn’t just a rare artifact; it tests who gets the final word on extinction science. Under New Zealand’s Protected Objects Act 1975, intact moa remains cannot leave the country without government permission. But this egg left before the law took effect. Nothing legally required anyone to return it. Colossal, a company that edits ancient genomes for a living, could have kept it for study. Instead, Ngāi Tahu will decide whether to scan or sample the egg for DNA, in line with tikanga, or Māori customary practice. “When we launched the moa program we made a clear commitment that indigenous leadership would guide the science and every decision surrounding the project. Securing and transporting this egg back to its rightful home is just part of that commitment. Regardless of when and how it left the country, we strongly feel all recognizable moa bones and remains as well as any other New Zealand artifacts should be returned to the country and its people. To quote Indiana Jones, “it belongs in a museum,” a museum in Aotearoa, under the care of the people whose ancestors lived alongside these extraordinary birds. We are honored to help return it home.” said Ben Lamm, CEO and Co-Founder of Colossal.

The scientists closest to the moa agree the egg is worth far more at home. “Moa are central to the natural and cultural history of Aotearoa,” said Dr. Paul Scofield, Senior Curator of Natural History at Canterbury Museum, who called the egg far more valuable in New Zealand than in any private collection overseas. The announcement opened this week’s international meeting of avian paleontologists in Christchurch. Sir Peter Jackson, a backer of Colossal’s moa program, flagged the sale and estimated that, once restored, the egg could become only the ninth known nearly intact moa egg. After six decades in private hands, a relic of Aotearoa’s ancient heritage is finally returning to the land and people where it belongs.