Flightless species of birds (such as ostriches, which are the largest living birds) tend to outsize any of the largest birds ...

Some species of birds like geese save energy by flying in close formation. Airliners could use a similar trick to burn less ...

When we think of large birds, we might picture swans, ostriches, or eagles. But which bird is the biggest? Well, it depends on what you mean by big! When considering the "biggest" bird species, ...