ILLINOI S UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN PRODUCTION NOTE University of Illinois at Urbana-Champaign Library Large-scale Digitization Project, 27.
~Z~v i-fs cj&~ jr?, ('??Y ILLINOIS NATURAL HISTORY SURVEY CENTER FOR WILDLIFE ECOLOGY 1992-1993 Aerial Waterfowl Inventories of Environmental Management Program Sites in the Confluence Region of the Illinois and Mississippi Rivers Annual Report by Stephen P. Havera and Michelle M. Georgi Illinois Natural History Survey 19 July 1993
The purpose of this project was to aerially inventory waterfowl during fall and spring, 1992-1993 at Stump Lake, Swan Lake, Calhoun Point, Dresser Island, Cuivre Island, Batchtown, and Pharrs Island EMP sites. Inventories were conducted from light aircraft flying at low levels. Fall inventories were made on 3 and 1 September; 5, 13, 19, and 26 October; 4, 9, and 16 November; 1, 8, and 16 December; and 5 January. Spring inventories were made on 17 and 23 February; 1, 8, 15, and 29 March; and 6 and 21 April. Species of waterfowl and their respective numbers were recorded during each inventory. The inventory data is summarized by site in tabular form displaying the peak (highest number counted for all inventories) population count by species for each compartment at each site and also for the entire site during fall (Sept.-Jan.) and spring (Feb.-Apr.) (Tables 2, 5, 8, 11, 14, 17, and 2). The peak number for the entire site may not represent the sum of the peaks for all the compartments because the peak numbers in the various compartments could have occurred on different flight dates. Additionally, the results of each waterfowl inventory are provided by date for each site (Tables 3, 4, 6, 7, 9, 1, 12, 13, 15, 16, 18, 19, 21, and 22). Copies of maps delineating the areas inventoried at each site are also provided (Figures 1-7).
STUMP LAKE
Table 1. Common names of waterfowl and abbreviations used in the report. aerially inventoried Common name Abbreviation Dabbling ducks Mallard American black duck Northern pintail Blue-winged teal Green-winged teal American wigeon Gadwall Northern shoveler Diving ducks Lesser and greater scaup Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Bufflehead Mergansers Common merganser Red-breasted merganser Hooded merganser Geese Canada goose Snow goose American coot I MALLARD BLK PNT BWT GWT WIG GAD SH SCAUP RN CNVB RH RDY GLD BH CM RBM HM CG B&SG COOT 2
Table 2. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Stump Lake EMP site, fall and spring, 1992-1993". Compartment Compartment Compartment Compartment 1 2 3 4 Total Fall Spring Fall Spring Fall Spring Fall Spring Fall Spring Dabbling ducks Mallard American black duck Northern pintail Blue-winged teal Green-winged teal American wigeon Gadwall Northern shoveler All dabbling ducks 3, 3 4,3 6 2, 2,2 2 1, 9,2 2,2 5 25 1, 1,5 25 5 5 1 5 5 4 1,4 175 2, 3,575 6 6 25 4 2 6 3,9 3 7, 6 2, 2,2 2, 1, 12,9 2,2 Diving ducks Lesser & greater scaup Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Buffiehead All diving ducks 25 1, 5 1, 3 2, 2, 2 1 2 1 2 25 2 2 5 2,k 1,1 5 2 3,1 Mergansers Common merganser 375 Red-breasted merganser Hooded merganser All mergansers 375 All ducks Geese Canada goose Snow goose American coot 25 25 5 5 425 425 3,9 1,3 7, 2,6 2, 2,25 2, 1, 12,9 4,5 2 3. 75 2 1 2 5 2 3, 6 4, 2 175 255 2 7,5 6 SThe peak numbr for the entir site may not represent the sum of the peaks for all the compartments because the peak numbers in the various compartments could have occurred on different flight dates.
V -.8....-' r I l *M r Compartment nt _( S19 irtmi *\ Figure 1. The Stump Lake EMP site with boundaries drawn delineating compartments 1, 2, 3, and 4. 4
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SWAN LAKE
Table 5. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Swan Lake EMP site, fall and spring, 1992-19938. Compartment Compartment Compartment 1 2 3 Total Fall Spring Fall Spring Fall Spring Fall Spring Dabbling ducks Mallard American black duck Northern pintail Blue-winged teal Green-winged teal American wigeon Gadwall Northern shoveler All dabbling ducks 45 5 1,2 2 5 1,75 5 27, 6 4 3,5 2,1 4, 4,8 7,2 1,5 9 37,6 6 25, 35 6 4, 2 2, 3,5 5 4, 6 1,7 27,85 4,3 4,45 95 6,5 2,275 5,6 7 6,9 8,3 2 2,1 6,3 58,22 3,5 6 7 5 2 4, Diving ducks Lesser & greater scaup Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Bufflehead All diving ducks 4 45 1,8 4, 3 5 3 15 2 4,3 165 6 3 4, 2 35 365 4,4 1, 1,5 2,4 5,5 2 1 15 3, 5,5 1,165 4,5 3 5 48 6,3 Mergansers Common merganser Red-breasted merganser Hooded merganser All mergansers 2 8 2 8 5 5 2 2 8 5 8 5 All ducks 1,75 3,9 37,6 2,2 27,85 6,3 62,52 1,6 Geese Canada goose Snow goose 5 3 1,2 1,5 5,2 2,725 3 1,5 5,2 1,5 American coot 3, 6 4,2 1, 7,2 1, * The peak number for the entire site may not represent the sum of the peaks for all the compartments because the peak numbers in the various compartments could have occurred on different flight dates.
SK^'^. v - F I:' Figure 2. The Swan Lake EMP site with boundaries drawn delineating compartments 1, 2, and 3. 9
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CALHOUN POINT
Table 8. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Calhoun Point EMP site, fall and spring, 1992-1993. Fall Spring Dabbling ducks Mallard 5 2,2 American black duck 1 Northern pintail Blue-winged teal Green-winged teal American wigeon Gadwall Northern shoveler All dabbling ducks 5 2,2 Diving ducks Lesser & greater scaup 5 Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Bufflehead All diving ducks 5 Mergansers Common merganser Red-breasted merganser Hooded merganser All mergansers All ddiflk 5 2,25 Gees Canada goose 63 Snow goose American coot 12
1) 1 R P L A I N V\/w Figure 3. The Calhoun Point EMP site with boundaries drawn delineating the area. 13
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DRESSER ISLAND
Table 11. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Dresser Island EMP site, fall and spring, 1992-1993. Fall Spring Dabbling ducks Mallard 52 2 American black duck Northern pintail Blue-winged teal Green-winged teal American wigeon Gadwall 2 Northern shoveler All dabbling ducks 52 2 Diving ducks Lesser & greater scaup Ring-necked duck Canvasback 5 Redhead Ruddy duck Common goldeneye Bufflehead All diving ducks 5 Mergansers Common merganser Red-breasted merganser Hooded merganser All mergansers All dueks 52 25 Geese Canada goose Snow goose American coot 16
Man9 I S Figure 4. The Dresser Island EMP site with boundaries drawn delineating the area. 17
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CUIVRE ISLAND
Table 14. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Cuivre Island EMP site, fall and spring, 1992-1993. Fall Spring Dabbling ducks Mallard 3 2 American black duck Northern pintail Blue-winged teal 1 Green-winged teal 2 American wigeon Gadwall Northern shoveler All dabbling ducks 3 2 Diving ducks Lesser & greater scaup Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Bufflehead All diving ducks Mergansers Common merganser Red-breasted merganser Hooded merganser AH mergansers All dutks 3 2 Geese Canada goose 7 Snow goose American coot 2
Figure 5. The Cuivre Island EMP site with boundaries drawn delineating the area. 21
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BATCHTOWN
Table 17. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Batchtown EMP site, fall and spring, 1992-1993. Compartment Compartment Compartment 1 2 3 Total Fall Spring Fall Spring Fall Spring Fall Spring Dabbling ducks Mallard American black duck Northern pintail Blue-winged teal Green-winged teal American wigeon Gadwall Northern shoveler All dabbling ducks 4,2 1 25 4,225 1 1 15, 2,35 5 2, 1,1 1,2 18,1 8, 2,5 1, 11,5 25 25 1 1 19,225 2,35 5 2, 1,1 1,2 22,325 8, 2,5 1, 11,675 Diving ducks Lesser & greater scaup Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Bufflehead All diving ducks 1, 1 4 1, 5 7 25 7 5 5 1 1 1, 1 4 1, 5 7 25 7 Mergansers Common merganser Red-breasted merganser Hooded merganser All mergansers 2 2 1,475 1,475 2 2 1,475 1,475 All ducks 5,225 1,485 18,1 11,5 25 11 23,325 11,675 Geese Canada goose Snow goose 5 45 6 1,6 6 5 6 2,5 American coot, 1,2 3 5 1,2 3 SThe peak numbrf for the entire site may not represent the sum of the peaks for all the compartments because the peak numbers in the various compartments could have occurred on different flight dates. 24
V" I SANDT CallU ODRMNAM DISTRICT >nt 1 a' rcntown Figure 6. The Batchtown EMP site with boundaries drawn delineating commpartments 1, 2, and 3. 25
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PHARRS ISLAND
Table 2. Peak numbers of waterfowl aerially inventoried by the Illinois Natural History Survey at Pharrs Island EMP site, fall and spring, 1992-19931. Compartment Compartment 1 2 Total Fall Spring Fall Spring Fall Spring Dabbling ducks Mallard 2 2 American black duck Northern pintail Blue-winged teal Green-winged teal 15 15 American wigeon Gadwall Northern shoveler All dabbling ducks 2 2 Diving ducks Lesser & greater scaup Ring-necked duck Canvasback Redhead Ruddy duck Common goldeneye Bufflehead All diving ducks Mergansers Common merganser Red-breasted merganser Hooded merganser All mergansers All ducks. 2 2 Geese Canada goose 4 4 Snow goose American coot a The peak number for the entire site may not represent the sum of the peaks for all the compartments because the peak numbers in the various compartments could have occurred on different flight dates. 28
/ / MISSOUI I S Figure 7. The Pharrs Island EMP site with boundaries drawn delineating compartments 1 and 2. 29
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