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1. Breeding Bird Survey Grid for Lower 48 States, Alaska and Southern portion of Canada [USGS_PWRC_BreedingBirdSurveyGrid]
This is a polygon coverage of the mathematically generated grid for North America, excluding Mexico and the Northern portion of Canada. The grid is used in the statistical analysis of the Breeding ...


2. The North American Breeding Bird Survey, Results and Analysis 1966 - 2011. Version 12-13-2012. [USGS_PWRC_BreedingBirdSurvey_V10.15.2010]
This website consists of a series of interactive programs and maps that describe population change for North American Birds summarized from North American Breeding Bird Survey (BBS) data. Metadata ...


3. North American Breeding Bird Survey (BBS) [brdpwrc0004]   CHILD DIFs
The North American Breeding Bird Survey (BBS), which is coordinated by the Biological Resources Division and Canadian Wildlife Service, is a primary source of population trend and distribution information ...


4. The North American Breeding Bird Survey Results and Analysis, 1966-2005 [PWRC_BBS2003]   PARENT DIF
The Breeding Bird Survey is a source of information about distributions and population changes of North American birds. It is also a tool for learning about birds, with with connections ...


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