Common Grackle ( Quiscale bronzé ) |
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Quiscalus quiscula | |||||||||||
General NotesThe North American population of this species has decreased by 61% in the forty years spanning 1966 to 2006, according to a recent analysis of Christmas Bird Count and Breeding Bird Survey records conducted by National Audubon Society scientists. Though there is always some inherent variability in the source data, there is sufficient data for this species to be able to quantify the change in population with a high level of statistical confidence. |
Abundance: | Abundant | Earliest observed date: |
Typical arrival date: |
March 31 | |
Breeding Status: | Breeding | Latest observed date: |
Typical departure date: |
October 26 |
Banding Results |
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Year |
Gillies
|
Hilliardton
|
Mountain
|
Year
|
1990 | 1 | 1 | ||
1992 | 1 | 1 | ||
1997 | 1 | 1 | 2 | |
1998 | 2 | 2 | ||
1999 | 14 | 14 | ||
2000 | 3 | 73 | 22 | 98 |
2001 | 57 | 25 | 82 | |
2002 | 88 | 36 | 124 | |
2003 | 52 | 62 | 114 | |
2004 | 84 | 34 | 118 | |
2005 | 66 | 58 | 124 | |
2006 | 138 | 14 | 152 | |
2007 | 67 | 67 | ||
2008 | ||||
2009 |