Fig. 7.

Prediction (vii): Directional consistency of migratory flights. Consistency was analysed by comparing the departure direction from Helgoland within the first ∼ 1–10 km with the bearing of the passage location on the coast after 50–100 km for five migrant songbirds, Redstart (orange circle), Garden Warbler (blue square), Wheatear (grey pointed downward triangle), Robin (red rhombus), and Dunnock (brown pointed upward triangle). The black diagonal line marks the 1:1 ratio, meaning that the bird did not change its flight direction. Points are slightly (< 5°) jittered to prevent overlap. For geographical map of the German bight see Fig. S2. Bird photos: TKa