Prehistoric Birds

Almost everyone has heard of Dinosaurs. And they went extinct. But, so did some birds. Two famous examples are The Dodo and Argentavis. Argentavis is the largest bird to have ever lived, with a humongous wingspan, of 7 meters. The Dodo was a flightless bird. Other species of extinct birds include The Great Auk, The Elephant Bird, Terror Birds, and The Haast's Eagle. It's a shame that they're extinct, otherwise we could learn much more about them, like how they looked. We know only the inner structure of them. We don't know their colour, etc, etc.