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Table 3 Sample sizes, geographic origin and climatic variables for the eggs of the nine larks species used in this study

From: Are antimicrobial defences in bird eggs related to climatic conditions associated with risk of trans-shell microbial infection?

Species

n

nest n

Latitude

Longitude

Altitude (m)

Country

P (mm)

T (°C)

AM

Hoopoe lark Alaemon alaudipes

18 (8)

9

22° 14’ N

41° 50’ E

1001

Saudi Arabia

42.23

26.22

1.17

Black-crowned finchlark Eremopterix nigriceps

3 (1)

3

21° 15’ N

40° 41’ E

1489

Saudi Arabia

64.16

22.40

1.98

Crested lark Galerida cristata

1 (0)

1

21° 15’ N

40° 41’ E

1489

Saudi Arabia

64.16

22.40

1.98

Red-capped lark Calandrella cinerea

12 (5)

7

0° 52’ S

36° 23’ E

2038

Kenya

193.96

20.72

6.31

 

2 (0)

1

0° 37’ S

36° 28’ E

2456

Kenya

275.83

16.07

10.58

Horned lark Eremophila alpestris

4 (2)

4

37° 10’ N

72° 53’ E

4084

Afghanistan

78.28

5.88

4.93

 

7 (2)

7

37° 24’ N

73° 30’ E

4122

Afghanistan

142.19

1.40

12.48

 

1 (0)

1

40° 02’ N

83° 09’ W

284

USA

206.05

13.24

8.86

Hume’s short-toed lark Calandrella acutirostris

3 (0)

3

37° 11’ N

72° 49’ E

4401

Afghanistan

78.28

5.88

4.93

 

9 (6)

7

37° 25’ N

76° 39’ E

4129

Afghanistan

37.20

5.53

2.40

 

1 (0)

1

37° 18’ N

73° 03’ E

3707

Afghanistan

119.09

-2.28

15.42

Oriental skylark Alauda gulgula

1 (0)

1

37° 01’ N

72° 41’ E

2802

Afghanistan

86.09

4.15

6.09

Skylark Alauda arvensis

29 (13)

14

52° 55’ N

6° 15’ E

10

Netherlands

302.92

11.27

14.24

Woodlark Lullula arborea

33 (13)

21

52° 55’ N

6° 15’ E

10

Netherlands

219.47

9.90

11.03

  1. n: number of eggs (in brackets, number showing some degree of embryonic development); nest n: number of nests. The climatic variables are mean breeding season values for precipitation (P), temperature (T) and the aridity index AM (P/T + 10). A lower value of AM indicates a more arid environment. Altitude values are taken from Google Earth[67].