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The North American Breeding Bird Survey Results and Analysis 1966-2001
Dedicated to Chandler S. Robbins, originator of the survey, to honor his 50 years of government service

Please cite this Page as:

Sauer, J. R., J. E. Hines, and J. Fallon. 2002. The North American Breeding Bird Survey, Results and Analysis 1966 - 2001. Version 2002.1, USGS Patuxent Wildlife Research Center, Laurel, MD

Most Recent Update: 29 May 2002.

Technical notes:
(1) This analysis will be the final 2000 analysis, and a draft 2001 analysis will be available shortly. (2) The BBS database has undergone extensive revisions in 1998-2000, and many of the changes will be reflected in the results. Please let us know about any problems you encounter!
(3) Some 1966 - 1996 analyses (e.g., distribution maps) have been retained here, but most of the trend results from earlier analyses have been moved to archives.
(4) Some species are grouped for analysis. These are indicated on the selection lists.
(5) Earlier versions of the web site have been archived, and are accessible via links.
(6) A credibility index has been added to trend results. This symbol flags imprecise, small sample size, or otherwise questionable results.

General Information

Survey Results

Species Groups: Analysis of Change for Species Groups
Summary information on population change by region and time period

Interactive Species Trend and Indices Program
This program allows you to display trends for 3 time intervals, by species. Indices are provided as links from the species names

Interactive Regional Trend and Indices Program
This program allows you to display trends for 3 time intervals, by region. Indices are provided as links from the region names

Link to additional summaries of 1966 - 2001 data
Link to additional summaries of the data, including additional time periods, and summaries excluding recent years.

Abundance Maps-Spatial Patterns of Bird Abundance
These are relative abundance maps, estimated over the interval 1982-1996.

Trend Maps-Spatial Patterns of Bird Population Change
These are maps of population change, based on the 1966-1996 interval.

Alaska relative abundance maps
These maps, based on BBS data in Alaska, are very rough. We will update them occasionally.

Interactive Checklists

Relative abundance maps
This program allows you to estimate mean abundance from BBS data for any species, at any location in the survey area. (This now includes Alaska!)

Analytical Tools

Interactive Route Data Summary
This program provides access to all information, for any species, on any BBS route. (not yet updated for 2001)

Interactive Route-regression Trend Analysis
This program allows you to estimate population change for any species and time interval (1966 - 2000), in any region covered by the BBS

Program Comdyn
This program is for estimation of species richness from BBS data using capture-recapture based estimation procedures.

Learning Tools

Tools for Learning about Birds
This link transfers you to the Bird Identification InfoCenter, in which is contained pictures, songs, and identification tips of most North American Bird Species.

Play the Patuxent Bird Quiz!
Test your skills of identifying North American bird songs, pictures, and breeding and wintering distributions.

The Migratory Bird Research Home Page
Visit the USGS Patuxent Wildlife Research Center Web Site

For More Information

The BBS Operations Home Page
Visit the Breeding Bird Survey Operations Web Site

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