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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)