David Morton of the Virginia DGIF kindly sent us a copy of the atlas data set as an access database in May 2007.
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.
Data extracted from: Trollinger, Jeffrey B. and Karen K. Reay, 2001. Breeding Bird Atlas of Virginia 1985-1989, Virginia Department of Game and Inland Fisheries, Richmond, Virginia, 219 pages.
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Treatment of the received dataset
We imported the
with modifications as follows to better combine with other atlases or to match publication cited above:
Chose not to include Merlin, Gray-cheeked Thrush and Snowy Owl based on normal distribution. Also not including 7 species that were observed only and show no breeding evidence. Several raptor sightings were downgraded to OB:RC, observed, raptor carrying food, based on the dataset received and confirmation from Dave Morton. The breeding codes CY, PA, CP, CE, BP, and BE included no description and were mapped as CO,CN or confirmed, adults carrying nesting material.
Jeff Trollinger at