Fig. 3
From: Migratory strategies across an ecological barrier: is the answer blowing in the wind?
Wind roses depicting wind conditions on the breeding grounds at 100Â msl. Warm colors represent faster speed (m/s) and the length of spoke represents the frequency of wind direction, with dashed lines depicting bird direction of travel. (a) Theoretical northwesterly wind blowing towards the theoretical direction of travel southeast. (b) & (c) Wind conditions on days when birds departed. (d) Theoretical southwesterly wind blowing against the theoretical direction of travel. (d & e) Conditions on the five days preceding departure