This post continues the discussion of the Seven methods of identifying birds.
[Answer to Quiz 6: American Dipper]
Flight is such an important behavior that I consider it separately. How fast are the wing beats? Are the wing beats continuous or with a pause between bursts? How far above and below the body do the wing strokes go? Is the flight progression straight, undulating, or irregular? Are the wings rounded or pointed? Are the wings held straight out or forward at the wrist and swept back?
Does the bird fly in a flock or singularly? Is the flock 'v' shaped, rounded, or a straggling line?
For more information see the article on separating Cedar Waxwings and Starlings in flight.
Quiz) This bird soars unsteadily for long periods of time, with its wings in a dihedral.