Fig. 4

Influence of timing of starting leg 1, leg 2 and leg 3 on the weather conditions experienced by white storks. Model predictions (blue line) of the relationship between white stork timing of migration and A1–A3 boundary layer height (m) and B1–B3 mean wind support (m/s), and C1–C3 mean zonal wind speed (m/s). Data was modelled using linear mixed models, with gaussian distributions, using bird id and year as random factors. Blue lines show the statistically significant relationships, shading represents 95% confidence intervals and points show the raw data for adults (purple) and juveniles (yellow)