The North American Breeding Bird Survey Results and Analysis 1966-2012

Most Recent Update: 22 December 2013.

This website provides comparisons of 1966 - 2011 BBS Summary Results and 1966 - 2012 BBS DRAFT analysis results. It is presently under review; we caution users that errors may still exist in interactive programs and summary analyses. See our disclaimer for additional cautions.

Note: The Regional Credibility measures in these summaries only screen for significantly different trend estimates between results.

We welcome comments on the results presented here. Public review and feedback of the results are a critical part of the scientific review of the website, and we thank you in advance for taking a careful look at these summaries.

Comparative Results

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