Data are presented here by agreement between the atlas project, NBII, and USGS Patuxent Wildlife Research Center.
Results should be
Bird Atlas Explorer (online resource). 2013. U.S. Geological Survey
Patuxent Wildlife Research Center & National Biological Information
Infrastructure. <Date of access>. http://www.pwrc.usgs.gov/bba.
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any unpublished data.
Any use of these data should be accompanied by the proper citation as shown above. For questions or to use large portions of the dataset, please contact Allan Hollander at email@example.com