Data are presented here by agreement between the atlas project and USGS Patuxent Wildlife Research Center.
Results should be
Bird Atlas Explorer (online resource). 2017. U.S. Geological Survey
Patuxent Wildlife Research Center. <Date of access>. http://www.pwrc.usgs.gov/bba.
Data extracted from: Kleen, Vernon M., Liane Cordle, and Robert A. Montgomery. 2004. The Illinois Breeding Bird Atlas. (Illinois Natural History Survey Special Publication No. 26.) Champaign, IL: Illinois Natural History Survey. 459 pp.
Any use of these data should be accompanied by the proper citation as shown above.
The atlas project was sponsored by the Illinois Department of Natural Resources in a joint effort with the Illinois Audubon Society and its chapters, the Illinois chapters of the National Audubon Society, and independent Audubon and birding organizations in Illinois.
Treatment of the received dataset
We imported the
with modifications as follows to better combine with other atlases or to match publication cited above:
Breeding code"/" in the original publication is shown as "E" in this website.
Black Vulture was included in the original publication with a species account and a blank map but it is excluded here because we do not include species without mappable data.
9 species (Gadwall, American Black Duck, Green-winged Teal, Redhead, Ring-necked Duck, Lesser Scaup, Ringed Turtle-Dove, Long-eared Owl, White-throated Sparrow) and 2 hybrids (Brewster's Warbler and Lawrence's Warbler) were not mapped in the original publication but are included here because they were reported with breeding evidence of PO or higher.
Vernon M. Kleen
see the atlas project site or contact the authors (no email address available - sorry).