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Table 2 Details of Golden-crowned Sparrow migration from 22 GPS tags

From: Land cover and NDVI are important predictors in habitat selection along migration for the Golden-crowned Sparrow, a temperate-zone migrating songbird

Bird

Year

Total days tracked

Filtered migration data points (spring/fall)

Calculated migration distance (km; spring/fall)

Minimum migration duration (days; spring/fall)

Uncertainty in duration (days; spring/fall)

Travel rate (km per day; spring/fall)

Number of longer stopovers recorded (spring/fall)

Point Reyes

49209

2019

72

12/–

3674.7/–

31/–

4/–

118.5/–

1/–

49218

2019

175

13/20

4239.2/4299.3

27/41

4/9

157/104.9

0/5

49222

2019

187

13/13

3985.6/3978

38/35

11/8

104.9/113.7

1/4

49201

2019

191

16/19

4152.1/3781.6

42/52

11/11

98.9/72.7

2/4

49200

2019

63

8/–

3354.9/–

25/–

4/–

134.2/–

1/–

 

Mean Point Reyes

137.6

12.4/17.3

3881.3/4019.6

32.6/42.7

 

122.7/97.1

1/4.3

UC Davis

49206

2019

173

13/17

3446.4/3467

33/37

6/13

104.4/93.7

2/3

49771

2020

60

13/–

3430.4/–

27/–

4/–

127.1/–

1/–

49775

2020

189

9/18

3826.2/4004.8

37/42

4/15

103.4/95.4

0/2

49191

2019

191

9/16

3387.3/3617.5

29/31

> 12/2

116.8/116.7

2/4

49192

2019

163

12/10

3510.8/3474.5

27/–

4/–

130/–

2/2

49194

2019

191

13/26

3937.9/3883.9

31/–

> 2/–

127/–

1/5

49205

2019

37

10/–

3663.7/–

31/–

> 2/–

118.2/–

1/–

49217

2019

191

16/22

3976.9/3979.7

35/–

> 2/–

113.6/–

1/5

49777

2020

187

8/14

3791.3/3970

31/–

4/–

122.3/–

1/3

49780

2020

199

14/17

3869.2/3893.5

29/45

4/4

133.4/86.5

2/2

49870

2020

185

7/14

3433.2/3567.9

21/–

6/–

163.5/–

1/2

49189-a

2019

191

11/16

3158.2/3357.5

25/33

6/11

126.3/101.7

1/4

49776-a

2020

195

6/23

3127.7/3495.6

21/–

12/–

148.9/–

1/5

49195-g

2019

191

16/28

3351.9/3444.1

33/–

> 2/–

101.6/–

3/4

49770-g

2020

189

11/15

3288.4/3349.2

27/–

> 4/–

121.8/–

2/4

49202-b

2019

191

8/5

1769.4/1747

17/15

4/6

104.1/116.5

1/2

49778-b

2020

163

8/2

1750.1/1738.1

21/–

4/–

83.3/–

3/1

 

Mean UC Davis

169.8

10.8/16.2

3336.4/3399.3

27.9/33.8

 

120.3/101.7

1.5/3.2

 

Overall mean

162.5

11.2/16.4

3460.2/3502.7

29.0/36.8

 

120.9/100.2

1.4/3.4

  1. Tags were deployed and recovered with data at wintering sites in northern California, and the table includes estimated distance and duration of spring and fall migration 2019–2020. Total days tracked includes the entire tracking time the tag recorded from deployment to when the tag stopped collecting points. Fall migration duration was not determined for tags that stopped collecting data during fall migration. Uncertainty is the sum of the uncertainty at both ends of migration (see “Methods” section); if information was missing for this calculation, we indicated that our estimates are potentially underestimates with “>”. No data is indicated by “–”. Bird “b” has a much lower migration distance as this bird ended its migration in British Columbia, Canada while all the other birds traveled to Alaska, USA