Fig. 2. Wing motion relative to the body of a rufous hummingbird (Selasphorus rufus) flying at velocities of 0-12 m s^-1. (A) Dorsal view with bird silhouette at mid-downstroke. As we measured kinematics only from the right wing, paths for the left-wing are mirror images. (B) Lateral view with bird silhouette at start of downstroke. Black circles indicate position of wingtips, and white circles indicate position of wrists. Paths of wing motion are from 3D measurements, so circles within the paths are synchronized for a given velocity. Circles and arrows indicate sequential position and local direction of movement.