Madagascar’s elephant birds — which weighed as much as three or four people and went extinct several hundred years ago — turn out to be the closest known relatives of New Zealand’s chicken-sized kiwi.

There would be at least four times as many flightless bird species on Earth today if it were not for human influences, finds a study led by UCL researchers. The study, published in Science Advances, ...

Freed from the threat of invasive predators, Galapagos birds are performing astonishing feats of return and innovation – 200 ...

Colossal Biosciences said it is working with famous "Lord of the Rings" director Sir Peter Jackson to bring the moa back to ...

Flightless Birds in the World: Birds are some of the most fascinating creatures in the animal kingdom. But what about birds that don’t fly at all? For centuries, humans have envied the freedom of ...

WELLINGTON, New Zealand (AP) — Research linking New Zealand’s diminutive kiwi with a giant extinct bird from Africa is prompting scientists to rethink how flightless birds evolved. A report published ...

May 9 (UPI) --Evolution produced the same flightless bird species twice, with each occurrence separated by tens of thousands of years. The phenomena, called iterative evolution, helped bring the ...

A bird that had previously gone extinct came back to life thanks to a rare evolutionary process known as "iterative evolution." The white-throated rail bird can presently be found on the island of ...

Scientists have discovered a new species of flightless bird on a remote island in the Philippines, the conservation group BirdLife International said Tuesday. The rare find is dramatic, as flightless ...

The largest birds ever known to scientists preferred roaming at night and were possibly blind, according to a study from researchers at the University of Texas at Austin. The elephant bird was a ...

A Tel Aviv University–led study of 160-million-year-old fossils shows that some feathered dinosaurs likely became flightless, challenging the idea that the evolution of flight followed a linear path ...