The team also noted a hinged flap near the base of the wing, called an Alula, which is deployed at right angles to the wing, which may be being used as a air flow-control device.
During the easterly monsoon season, birds of paradise lose the magnificent feathers around their tails that naturalists call 'below-the-wing' feathers.
This friction can cause static to build up, with the excess electrons often accumulating in the thinnest edges of the airframe, such as the ends of the ailerons and flaps.
If the aileron is jammed, we can use the rudder to control rolling; if the elevator is jammed, we should maintain the pitch, reduce power and use elevator trim tab.