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| interpretation about the trend lines single day count of 14,670! |
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| Interpretation
(GRB): Variable, but lower than in other decades: The numbers of Broad-winged Hawks at Hook Mountain have been variable over the years, making a significant trend difficult. The long-term trend suggests a decline. The 10 - year trend is stronger, but is still not significant. In 2011 we happily counted 16,023 Broad-wings, with a single day count of 14,670! |
| About the trend lines: |
| The trend lines have not been tested for significance. Their intent is to provide an overview of the general trend. The graphs show two trend lines: 1971 - 2008, and 1999 - 2008. The Hook Mountain Hawk Watch began in 1971, and the points with blue markers indicate the totals for all these years. The points that show red squares around the blue markers represent the last ten years, showing the trend in this last decade. more about trend lines . . . . |
