Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, D. J. Ziolkowski, Jr., and W. A. Link. 2012.
The North American Breeding Bird Survey, Results and Analysis 1966 - 2011.
USGS Eastern Ecological Science Center, Laurel, MD
Most Recent Update: 22 February 2013.
This website presents population change information for more than 400 species of North American birds, as estimated from the North American Breeding Bird Survey. Estimates of trend (interval-specific estimates of population change), annual indices of abundance, and maps of abundance and population change for these species are presented for a variety of regions.
This website contains the first public copy of 1966 - 2011 BBS analysis results. Although it has been reviewed, we caution users that errors can develop in interactive programs and summary analyses. See ourdisclaimer for additional cautions.
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.
Although these data have been processed successfully on a
computer system at the United States Geological Survey (USGS), no warranty
expressed or implied is made regarding the accuracy or utility of
the data on any other system or for general or scientific purposes,
nor shall the act of distribution constitute any such warranty.
This disclaimer applies both to individual use of the data and
aggregate use with other data. It is strongly recommended that
these data are directly acquired from a USGS
server, and not indirectly through other sources which may have
changed the data in some way. It is also strongly recommended that
careful attention be paid to the contents of the metadata file
associated with these data. The USGS shall
not be held liable for improper or incorrect use of the data
described and/or contained herein.
So, these data are provided as is and without
any express or implied warranties, including, without limitation,
warranties of merchantability and fitness for a particular purpose.
Also, use of trade names or commercial
products in this home page is solely for the purpose of providing
and does not imply recommendation or endorsement by the U.S.