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Clutch size information from 23 sites studied by the Saltmarsh Habitat and Avian Research Program, 2011-2013 (Ruskin et al. 2017; SHARP unpubl. data). Clutch sizes of 1 and >5 excluded; former assumed to be incomplete and their exclusion removes some cases of partial loss prior to discovery; larger clutches potentially involve multiple females.

Study site

State

Total nests

Mean clutch size

SD

Mode

Oyster Creek

NJ

30

3.55

0.62

4

Mullica Wilderness

NJ

70

3.45

0.62

4

AT&T

NJ

68

3.53

0.71

4

Idlewild

NY

6

4.71

0.49

5

Four Sparrow Marsh

NY

15

3.86

0.77

4

Sawmill Creek

NY

26

3.73

0.78

4

Marine Nature Park

NY

10

3.90

0.88

3

East River

CT

60

3.57

0.78

4

Hammonasset

CT

50

3.61

0.61

4

Pattaganset

CT

5

3.80

0.45

4

Waterford

CT

1

3.00

NA

3

Barn Island

CT

33

3.84

0.81

4

John H Chaffee

RI

28

3.56

0.75

4

Sachuest Point

RI

20

3.90

0.85

4

Parker River

MA

26

3.73

0.78

4

Lubberland Creek

NH

25

3.63

0.65

4

Chapman's Landing

NH

129

3.48

0.70

4

Jones Creek

ME

78

3.68

0.72

4

Nonesuch River

ME

28

4.07

0.78

4

Libby River

ME

4

4.50

1.00

5

Eldridge Road

ME

60

3.82

0.70

4

Little River

ME

4

4.50

0.71

4

Scarborough Marsh

ME

58

3.72

0.86

4