Reduction of turbulence over the wing surface is accomplished by slotting of feathers at the wing tip and by the __________,a small group of feathers supported by the bones of the second digit.
A)hamulus
B)barbule
C)rictal bristles
D)alula
E)uncinate

Question

Quizplus · Accepted Answer

The alula is a small group of feathers located on the front edge of the wing, supported by the bones of the second digit. It helps to reduce turbulence over the wing surface and improve flight control.

Reduction of Turbulence Over the Wing Surface Is Accomplished by Slotting