Figure 1.

Kinematics of 360° rolling manoeuvres. (a) Example of one lunge. Increasing roll values represent clockwise rotation about the animal's long axis (from the whale's perspective) and negative values indicate a counter-clockwise rotation. (b) Variation in speed among all individuals during lunges (black) and not during lunges (grey). Error bars represent 1 s.d. among individuals. (c) Overhead (i) and lateral view (ii) of the whale's trajectory during a surface feeding 360° leftward rolling lunge.