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Measures of Snowy Owl reproductive success.

YearAverage Clutch SizeHatching Success1Nestling Success2Minimum Fledging Success3Maximum Fledging Success4
19936 (18)79 (100)84 (79)18 (79)66 (79)
19955 (48)69 (232)63 (160)46 (160)52 (160)
19967 (19)90 (129)66 (116)62 (116)63 (116)
19995 (26)59 (127)57 (75)45 (75)55 (75)
20006 (15)73 (91)83 (66)62 (66)76 (66)
20025 (4)76 (21)31 (16)19 (16)19 (16)
20036 (6)39 (38)47 (15)13 (15)27 (15)
20058 (4)77 (30)61 (23)48 (23)57 (23)
20066 (35)91 (216)87 (196)32 (196)80 (196)
20086 (31)87 (175)85 (152)78 (152)80 (152)
20116 (3)61 (18)73 (11) 73 (11)73 (11)
20126 (11)69 (68)74 (47)62 (47)68 (47)
20146 (19)51 (114)50 (58)40 (58)45 (58)
Total6 (239)75 (1359)73 (1014)48 (1014)65 (1014)

1Percent eggs laid that hatched

2Percent nestlings hatched that dispersed from nest

3Percent nestlings hatched that were confirmed to fledged

4Percent nestlings hatched that were presumed to fledge based on age of last observation