Ratites are a group of large, flightless birds that include species such as ostriches, emus, kiwis, and cassowaries. They are characterized by their flat breastbones, which lack the keel that is found in flying birds. This anatomical feature makes them unable to fly, but they are well-adapted for running and foraging on the ground. These birds are primarily found in the Southern Hemisphere, with ostriches native to Africa and emus to Australia. Ratites have a unique evolutionary history, believed to have descended from flying ancestors millions of years ago. Their diverse habitats range from forests to grasslands, showcasing their adaptability.