Colossal Biosciences Claims Historic Milestone – First Giant Moa Chick named Gaia Hatches Alive

Dallas, Texas / Christchurch, New Zealand – May 26, 2026  

In what represents one of the most extraordinary achievements in modern biotechnology, Colossal Biosciences CAO has announced the successful hatching of the first living South Island giant moa chick in over 600 years.

The news broke this afternoon directly from Matt James, Chief Animal Officer at Colossal Biosciences, on his personal X account. Matt James (@MattjamesCAO) on X: “After years of work, we did it. The first giant moa chick has hatched healthy and strong. We’ve named her Gaia. She’s already standing 11 inches tall at just days old and growing fast. This is for New Zealand, for science, and for the future of conservation. More photos and video coming soon.”

The Giant Returns: Background on the Lost Species

The South Island giant moa was one of the most imposing birds ever to exist. Adults reached heights of up to 12 feet (3.6 meters) and weights of more than 510 pounds (230 kg). These flightless herbivores browsed high vegetation with their elongated necks, played crucial roles in seed dispersal, and helped shape New Zealand’s unique forest and shrubland ecosystems. Unlike many other ratites, they had no wings whatsoever.

The species, along with eight other moa varieties, vanished rapidly around 600 years ago following the arrival of Māori settlers, primarily due to overhunting and habitat alteration. Their extinction also contributed to the loss of Haast’s eagle, their main predator. Māori oral traditions and cultural records preserve deep connections to the moa as sources of food, tools, feathers, and spiritual significance.

Real Science Behind the Breakthrough

According to Colossal’s previously disclosed roadmap, the project relies on “functional de-extinction.” Scientists sequenced high-quality ancient DNA extracted from dozens of moa bone samples. They then used multiplex gene editing on primordial germ cells (PGCs) derived from the closest living relatives — tinamous (small South American birds) and larger flightless proxies such as emus — to introduce traits for massive body size, elongated necks, powerful legs, and other moa-specific adaptations.

A pivotal real-world advancement came earlier this month in May 2026, when Colossal successfully hatched 26 healthy chickens from 3D-printed artificial eggshells. These custom structures feature a rigid lattice coated with a silicone membrane engineered to replicate natural gas exchange. The technology was developed specifically to overcome the insurmountable challenge of moa eggs, which were enormous — far too large for any living bird species to produce or incubate naturally.

A Māori-Led Collaboration with Major Backing

The initiative was formally launched in July 2025 as a partnership between Colossal Biosciences, the Ngāi Tahu Research Centre at the University of Canterbury, and other Māori stakeholders. It emphasizes Indigenous leadership and the restoration of taonga (treasured) species. The project also received a $15 million commitment from filmmaker Sir Peter Jackson and Fran Walsh. Jackson, a lifelong moa enthusiast who possesses one of the largest private collections of moa bones, has long expressed fascination with the possibility of seeing these giants walk again.

Beyond the giant moa, the effort includes full genome sequencing for all nine known moa species, aiming to deepen understanding of their evolutionary history and support broader ecological restoration goals in New Zealand.

What This Milestone Would Mean

A living giant moa proxy named Gaia marks Colossal’s most ambitious avian de-extinction success to date, following progress on species such as the dire wolf and ongoing work on the dodo, thylacine, and woolly mammoth. The company has consistently stressed that these animals are proxies designed to fulfill lost ecological roles rather than exact genetic clones.

Matt James’ announcement tweet remains the sole official statement from the company so far. In it, he highlighted Gaia’s early vigor and rapid growth, signaling strong early health indicators for the young chick. The scientific community awaits peer-reviewed data, detailed health metrics on Gaia, genetic verification of the edits, and further updates on her development.

Additional images, video footage of Gaia, and statements from the team are expected in the coming days as Colossal monitors the chick’s progress in a specialized biosecure facility.