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.

And when this atoll was swallowed up by the waves, that bird went extinct. ... Or did it? Did the flightless Aldabra rail evolve twice? Would you like an Aldabra rail pin? Subscribe to the pin club ...

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, ...

From extinction to rebirth, here’s a breakdown of how the takahē — one of Earth’s rarest birds — came back from an ...

Aside from being a delight to watch, flight in birds is regarded by many cultures as a symbol of freedom, and a source of inspiration for humans to build our own flying machines. This makes those ...

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 ...

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 ...

ALACHUA, Fla. (AP) — A large, flightless bird native to Australia and New Guinea attacked and killed its owner when the man fell on his farm in Florida, authorities said Saturday. The Alachua County ...