Table 2 Summary table comparing the mean values of autumn and spring migration parameters generated from tagged Greater White-fronted Geese (Anser albifrons) fitted with solar-powered GPS/GSM telemetry devices in China 2014‒2016, which provided full information on at least one complete spring and autumn migration used in the current analysis
Measures | Spring (mean ± SD) | Autumn (mean ± SD) |
|---|---|---|
Departure date (Julian date) | 83 ± 9 | 264 ± 4 |
Arrival date (Julian date) | 162 ± 10 | 300 ± 9 |
Migration duration (days) | 79 ± 12 | 35 ± 7 |
Migration distance (km) | 6111 ± 477 | 5733 ± 363 |
Migration speed (km/day) | 79 ± 16 | 170 ± 46 |
Total travel days (days) | 20 ± 5 | 12 ± 4 |
Travel speed (km/day) | 327 ± 93 | 526 ± 155 |
Number of stopovers | 6.1 ± 1.9 | 2.1 ± 0.8 |
Number of flight Legs | 7.1 ± 1.9 | 3.1 ± 0.8 |
Stopover duration (days) | 59 ± 16 | 23 ± 6 |
Step length (km) | 787 ± 302 | 1710 ± 476 |
Straightness index | 0.81 ± 0.06 | 0.86 ± 0.06 |