Table 1 Summary of adult and juvenile white stork migration characteristics for the whole migration and for the three different migration legs: Leg 1—from Portugal until the Strait of Gibraltar; Leg 2—from the Strait of Gibraltar until the Atlas Mountains; Leg 3—from the Atlas Mountains until south of the Sahara Desert
Migratory Leg | Age | Mean start date (range) | Mean migration duration, in days (SE) | Mean number of migration days (SE) | Mean number of stopover days (SE) | Mean beeline distance, in km (SE) | Mean route straightness index (SE) | Mean latitude of destination, in degrees (range) | Mean longitude of destination, in degrees (range) |
|---|---|---|---|---|---|---|---|---|---|
All migration | Adult | – | 25 (3.1) | 16 (0.5) | 10 (3.0) | 2563 (38.4) | 0.73 (0.02) | 16.68 (14.65–17.94) | − 7.28 (− 15.51 to 7.27) |
|  | Juvenile | – | 31 (2.2) | 18 (0.3) | 14 (2.1) | 2525 (15.3) | 0.67 (0.01) | 16.67 (15.25–17.98) | − 3.24 (− 15.53 to 7.03) |
Leg 1 | Adult | 10.Aug (09.Jul–03.Sep) | 9 (2.2) | 4 (0.3) | 6 (2.1) | 376 (11.2) | 0.71 (0.03) | – | – |
|  | Juvenile | 04. Aug (07.Jul–04.Sep) | 10 (1.4) | 4 (0.1) | 6 (1.4) | 374 (7.6) | 0.63 (0.01) | – | – |
Leg 2 | Adult | 20. Aug (21.Jul–12.Sep) | 6 (1.4) | 3 (0.1) | 3 (1.4) | 562 (21.0) | 0.85 (0.02) | – | – |
|  | Juvenile | 14.Aug (19.Jul–10. Sep) | 9 (1.5) | 3 (0.2) | 6 (1.4) | 504 (17.2) | 0.78 (0.02) | – | – |
Leg 3 | Adult | 26.Aug (06.Aug–15.Sep) | 11 (1.1) | 9 (0.6) | 2 (0.6) | 1679 (53.0) | 0.74 (0.02) | – | – |
|  | Juvenile | 24.Aug (22.Jul–03.Oct) | 12 (0.4) | 11 (0.3) | 1 (0.3) | 1723 (21.9) | 0.69 (0.01) | – | – |