North American Breeding Bird Survey

Species Group Summaries for Bird Conservation Regions


Draft 2007 analysis: Review copy


Select a time period, region, and species group, and this program will produce a summary of trends. The summary includes: We also provide some estimates of mean trend and a ranking of species from most extreme decline to most extreme increase, using the procedures given in Link and Sauer 1996. These results adjust estimates for relative precision, and you can estimate: See Link and Sauer (1996) for the details of estimating the precision-adjusted averages.

These results are based on the Route-regression, estimating equations method.


Please select the time period of interest:

Please enter the Bird Conservation Region of interest:

Please select the guild of interest:


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ver 2005.0, 16 January 2006, Authors: J. R. Sauer and J. E. Hines.

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