Whether they’re opening for takeoff, spreading wide for a lazy soar or flapping to brake for landing, bird wings make flying ...

She noticed small feathers underneath the bird’s wings popping out in unusual ways. Unlike the larger contour and flight feathers that streamline a bird’s body, these covert feathers are ...

Numerous bird species feature small covert feathers layered on their wings. As the name implies, these feathers remain hidden flat against the wing during normal flight but flare to mitigate ...