The emu is a flightless bird with wings that have undergone significant reduction. Despite this, the precise mechanisms behind the morphological changes in their wings have remained largely unknown.

These small feathers on top of birds’ wings lay flat during normal flight ... and RC aircraft trials revealed a fascinating two-part mechanism. The front flaps interact with the turbulent ...

To generate lift, a bird has merely to tilt its wings, adjusting the flow of air below and above them. Airplane wings exploit some of the same aerodynamic tricks. But a bird wing is vastly more ...