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Table 1 Breeding and fledgling data – Carden and Dyer’s Bay 2006-2011

From: Factors influencing mortality in a captive breeding population of Loggerhead Shrike, Eastern subspecies (Lanius ludovicianus ssp.) in Canada

  

2006

2007

2008

2009

2010

2011

Total

Carden

Breeding pairs

N

9

9

9

12

9

10

58

Clutches

N

15

11

15

19

15

14

89

Total fledglings produced

N

62

45

53

79

59

53

351

Fledglings released

N (%)

62 (100)

37 (82)

41 (77)

69 (87)

30 (51)

5 (9)

244 (70)

Fledglings retained

N (%)

0

0

3 (6)

3 (4)

3 (5)

9 (17)

18 (5)

Fledglings dead

N (%)

0

8 (18)

9 (17)

7 (9)

26 (44)

39 (74)

89 (25)

Dyer’s Bay

Breeding pairs

N

9

10

9

5

9

8

50

Clutches

N

13

16

16

7

12

12

76

Total fledglings produced

N

67

66

78

27

60

47

345

Fledglings released

N (%)

49 (73)

54 (82)

48 (62)

20 (74)

43 (72)

16 (34)

230 (67)

Fledglings retained

N (%)

17 (25)

5 (8)

7 (9)

2 (7)

6 (10)

14 (30)

51 (15)

Fledglings dead

N (%)

1 (1)

7 (11)

23 (29)

5 (19)

11 (18)

17 (36)

64 (19)