flightless
Some birds have lost the ability to fly during the course of their evolution. Several flightless birds are shown in Figure below . They include the ostrich, kiwi, rhea, cassowary, and moa. All of these birds have long legs and are adapted for running. The penguins shown in the figure are also flightless birds, but they have a very different body shape. Thats because they are adapted for swimming rather than running.
27.0k questions
26.9k answers
2 comments
3.9k users