What specific wing posture, appearing as a shallow V-shape, is a key identifier for harriers while sailing?

Answer

Dihedral

When sailing, the harrier adopts a dihedral, which is a shallow V-shape formed by the wings, aiding in identification from a distance.

What specific wing posture, appearing as a shallow V-shape, is a key identifier for harriers while sailing?
birdcharacteristicHarrier