. Bulletin. Natural history; Natural history. Fig. 6.—Acreage of various bird habitats in Illinois from about 1800 through the years of the bird surveys reported here. Acreage data are principally from four sources: published records of the United States Bureau of the Census, published records of the Illinois Cooperative Crop Reporting Service (Ewing 1959), published wetlands survey of the U. S. Fish and Wild- life Service (Shaw & Fredine 1956), and published records of the University of Illinois Agri- cultural Experiment Station (King & Winters 1952).. Please note that these images ar

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. Bulletin. Natural history; Natural history. Fig. 6.—Acreage of various bird habitats in Illinois from about 1800 through the years of the bird surveys reported here. Acreage data are principally from four sources: published records of the United States Bureau of the Census, published records of the Illinois Cooperative Crop Reporting Service (Ewing 1959), published wetlands survey of the U. S. Fish and Wild- life Service (Shaw & Fredine 1956), and published records of the University of Illinois Agri- cultural Experiment Station (King & Winters 1952).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division

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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory