Large flightless birds of the southern continents -- African ostriches, Australian emus and cassowaries, South American rheas and the New Zealand kiwi -- do not share a common flightless ancestor as ...

When we think of birds we imagine the few creatures that have actually mastered the art of flying. But it may surprise you to know that there are more than 60 species of bird alive today that cannot ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. The woolly flying squirrel and South Island takahe are two ...