Research finds that the ancient ostriches developed their flightlessness that we find in modern birds due to the absence of predators.

A 56 million-year-old fossil bone helps explain how this (mostly) flightless family of birds spread to so many different ...

How did the ostrich cross the ocean? It may sound like a joke, but scientists have long been puzzled by how the family of birds that includes African ostriches, Australian emus and cassowaries, New ...

A 56 million-year-old fossil bone helps explain how this (mostly) flightless family of birds spread to so many different ...

Ostriches may be ground-bound, but their ancestors could take flight, a new study says The fearsome Australian cassowary, which cannot fly but is sometimes called "the world's most dangerous bird" ...