Fig. 3

Influence of timing of start leg 3 (crossing the Sahara Desert) on the destination of autumn migration. A Model predictions of the relationship between the start date of leg 3 and the longitude of autumn migration. Data was fitted with linear mixed models with gaussian distribution, using bird id and year as random factors. Red lines show the statistically significant relationship, shading represents 95% confidence interval and points show the raw data for adults (purple) and juveniles (yellow). B Longitude of the autumn migration destination in the Sahel for early and late migrant white storks. Early birds starting leg 3 on the 1st and 2nd quartile of the migration dates are represented as dark blue and dark brown, respectively, while late birds (later than the median) are represented as light blue and light brown, respectively