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Table 1 Summary of migration phenology for all tracked Northern wheatears

From: Flexible reaction norms to environmental variables along the migration route and the significance of stopover duration for total speed of migration in a songbird migrant

Bird Start of autumn migration [Julian day] Arrival at wintering grounds [Julian day] Total stopover duration [days] Total speed of migration in autumn [km/day] Start of spring migration [Julian day] Total stopover duration [days] Total speed of migration in autumn [km/day]
7902 216 318 45 152 98 7 262
7910 233 315 33 163 94 18 279
7916 229 317 38 173 91 25 166
B070 226 315 38 181 112 9 324
E552 216 307 45 136 100 7 271
E553 229 322 53 139 89 18 182
E801 221 315 43 287 90 20 160
E823 227 331 60 247 84 26 198
  1. Note, that tracking towards Alaska in spring ceased after birds entered areas with 24 h daylight. Total stopover duration and total speed of migration were therefore only calculated by departure date from the wintering ground to arrival at the last location estimate during spring migration (cf. Fig. 1 and Additional file 4 for more details)