. Bulletin. Natural history; Natural history. 10-16 17-23 24-3l 31 6 7-13 1-1-20 21-27 28-4 5-11 12-18 19-25 25-1 2-8 9-15 16 22 2329 30-b 7-i3 142021-27 AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER Fig. 8.—Five-year average, 1938-1942, of the seasonal migration of the blue-winged and green-winged teals, widgeon and shoveler in the Illinois River OCTOBER 2-e 9-15 16-22 23-29 30-6 7-13 14-20 21-27 28-3 NOVEMBER DECEMBER SEPTLMBEP Fig. 9.—Five-year average, 1938-1942, of the seasonal migration of the pintail, coot and gadwall in the Illinois River Please note that these images ar
. Bulletin. Natural history; Natural history. 10-16 17-23 24-3l 31 6 7-13 1-1-20 21-27 28-4 5-11 12-18 19-25 25-1 2-8 9-15 16 22 2329 30-b 7-i3 142021-27 AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER Fig. 8.—Five-year average, 1938-1942, of the seasonal migration of the blue-winged and green-winged teals, widgeon and shoveler in the Illinois River OCTOBER 2-e 9-15 16-22 23-29 30-6 7-13 14-20 21-27 28-3 NOVEMBER DECEMBER SEPTLMBEP Fig. 9.—Five-year average, 1938-1942, of the seasonal migration of the pintail, coot and gadwall in the Illinois River 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
