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Accession Number 5001900

Title Coordination of the North American Breeding Bird Survey

Project Description The North American Breeding Bird Survey (BBS) was established in 1966 to monitor the status

and trends of all species of birds breeding in North America. The survey consists of approximately

4000 randomly-located roadside routes scattered across the continental United States, Canada,

and Alaska. Each route is 24.5 miles long, with 3-minute point counts conducted at 0.5 mile

intervals, and is surveyed once annually during the peak of breeding activity. The counts of each

species along a route are used as indices of abundance used to estimate changes in bird

population levels. The BBS provides trend estimates for more than 400 species of birds at various

geographic scales, and these data are widely used by resource managers, researchers,

non-governmental organizations, and the general public to indicate the overall health of regional

avian communities and the ecosystems they inhabit.

Keywords breeding bird surveys, build analysis, population trends, regional analysis,

Principal Keith Pardieck, USGS Patuxent Wildlife Research Center:;


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