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Table 1 Bird information, individual and summarized autumn migration parameters of tracked Common Shelducks (Tadorna tadorna) based on tracking data retrieved on 16 March 2018

From: Variability among autumn migration patterns of Mongolian Common Shelducks (Tadorna tadorna)

Logger Captured date Age Sex Body mass on capture (g) Duration of tracking (days) Start of migration End of migration Migration duration (days) Migration distance (km) Straightness index No. stopovers Stopover duration (days) Mean ± SD duration of stopovers (days) Migration speed (km/day)
2252a 7/25/2017 2cy Male 980 203 8/24/2017 12/6/2017 103.5 1526.5 0.9 2 90.3 45.13 ± 22.92 14.7
2247 7/26/2017 Adult Male 1140 234 9/28/2017 9/29/2017 1.5 1070.2 1.0 0 0.0 0 734.0
2229 7/26/2017 Adult Male 1240 233 9/10/2017 1/5/2018 116.8 1908.6 0.6 5 111.7 22.35 ± 20.99 16.3
2226a 7/26/2017 Adult Male 1100 186 8/25/2017 11/14/2017 80.9 1189.7 0.9 1 71.7 71.75 14.7
2224 7/26/2017 Adult Male 960 223 8/24/2017 12/13/2017 110.6 2092.1 0.7 5 104.1 20.82 ± 13.46 18.9
2220 7/25/2017 Adult Female 710 190 8/12/2017 1/11/2018 151.8 2114.0 0.9 5 148.1 29.62 ± 24.62 13.9
2217a 7/26/2017 Adult Male 1100 210 9/10/2017 11/20/2017 70.9 1320.9 1.0 1 60.3 60.29 18.6
2207a 7/25/2017 2cy Male 1030 208 9/16/2017 12/22/2017 97.0 2018.0 0.7 2 65.5 32.77 ± 10.75 20.8
2173a 7/25/2017 Adult Female 960 235 9/10/2017 12/11/2017 92.1 2396.4 1.0 2 77.3 38.65 ± 50.41 26.0
2155 7/25/2017 Adult Female 1000 217 9/10/2017 12/11/2017 92.3 1492.8 0.9 2 89.9 44.96 ± 53.09 16.2
Mean     1022 213.9 9/5/2017 12/6/2017 91.7 1712.9 0.9 2.5 81.9 32.8 89.4
Standard deviation     134.5 17.7 13.5 days 29.6 days 38.7 450.5 0.1 1.8 38.7 25.1 226.5
  1. “2cy” denotes the second-year bird
  2. amigration tracks containing data gaps, see the section “Methods” for more details