Table 2 The candidate models to explain the 95% home range and 50% home range of staging great knots in Yalu Jiang. ‘Sex’ was only included in 2012 data.

95% home range 2012

95% home range ~ Tarsus length + Body mass + Wing length

4

384.3

–

95% home range ~ Sex + Body mass + Wing length

4

386.0

1.68

95% home range ~ Body mass + Wing length

2

386.2

1.90

95% home range ~ Body mass

1

386.2

1.94

95% home range ~ Sex + Tarsus length + Body mass + Wing length

5

386.3

1.98

50% home range 2012

50% home range ~ Body mass + Wing length

3

338.2

–

50% home range ~ Body mass

2

339.2

0.91

50% home range ~ Head + bill length + Body mass + Wing length

4

339.2

0.95

50% home range ~ Arrival date + Body mass

3

339.7

1.48

50% home range ~ Arrival date + Body mass + Wing length

4

340.3

2.03

95% home range 2012 + 2015

95% home range ~ Body mass

2

658.7

–

95% home range ~ Arrival date + Body mass

3

659.6

0.85

95% home range ~ Body mass + Year

2

659.6

0.89

95% home range ~ Arrival date + Body mass + Year

4

660.8

2.04

95% home range ~ Tarsus length + Body mass

3

660.9

2.16

50% home range 2012 + 2015

50% home range ~ Arrival date + Body mass + Year

4

582.9

–

50% home range ~ Body mass + Year

3

583.6

0.73

50% home range ~ Arrival date + Body mass

3

583.8

0.93

50% home range ~ Body mass

2

584.8

1.96

50% home range ~ Wing length + Body mass + Year + Arrival date

5

585.2

2.35