WATERFOWL CENSUSES ON CERTAIN RESERVOIRS IN SOUTHERN ILLINOIS INTRODUCTION

/C'II I ;LEN C.. s,nderson WATERFOWL CENSUSES ON CERTAIN RESERVOIRS IN SOUTHERN ILLINOIS19798. Glen C. Sanderson, Head Setion of Wildlife Researh inois Natural History Survey Urbana, inois 6181 11 August 198 INTRODUCTION From the fall of 1972 through 197778, from 9 to 12 aerial waterfowl ensuses were made at approximately 2week intervals on 6 or 7 reservoirs in southern inois (Sanderson 1978). In 1972, Lake Springfield, Sanghris Lake, Carlyle Lake, Rend Lake, Baldwin Lake, and Coffeen Lake were ensused. In 1975, Shelbyville Lake was added, and from 197576 through 197778 the 7 reservoirs were ensused eah year for waterfowl. In 197879, the Central 111 inois Publi Servie Co. (CIPS) Lake near Bogota and the inois Power Co. (IP) Lake near Clinton were added; however, CIPSBogota was ensused only 5 times and IPClinton only 4 times. During 197879, Lake Springfield, Shelbyville Lake, Carlyle Lake, and Rend Lake were eah ensused 5 times; Baldwin Lake 1 times, Lake Sanghris 11 times; and Coffeen Lake 4 times. In 19798, the same 9 lakes were ensused, but IPClinton was ensused 7 times, Lake Shelbyville 4 times, CIPSBogota 8 times, and the other lakes 9 times eah (Table 1). Fog prevented ensuses one eah on Lake Shelbyville, Baldwin Lake, CIPSBogota, and IPClinton. More ensuses were not made on Lake Shelbyville beause it required extra flying time and on many days depending on the weather and number of birds to be ountedthere was not enough time to ensus it. Exept for the ensus on 13 Deember, ensuses on IPClinton were made during the 11 northeast 11 flights instead of with the "southern" flights. Thus, they were of ten made on different dates than the ensus flights on the other reservoirs. Although few birds were ounted on Coffeen Lake, it was ensused beause of its onvenient loation and relatively sma 11 size. These surveys have been made in the same manner and by the same individual (Robert Crompton, inois Natural History Survey). Nine flights were made in eah of the first 3 seasons and on most of the reservoirs in 19798, 12 flights were made in 197677, and 11 flights were made in eah of 197576 and 197879, Dates of the initial flights ranged from 27 Otober 1978 to 6 Deember 1973, Dates of the final flights ranged from 21 Marh 1973 to 13 April 1977, Only those speies of waterfowl listed in Tables 2 and 3 were identified during these flights. Birds ensused on these flights inluded 19 speies of duks, two speies of geese (small raes of Canada geese were reognized for the first time in 197879), oot, bald eagle, ormorant, mute swan, and ommon loon. Only one speies (loon) was identified for the first time in 19798, and 3 speies or raes (wood duk, small Canada geese, and mute swan), ounted in 1 or more previous seasons, were not seen in 19798.

Sanderson 2 From 197273 through 19798 waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois, were onduted under a series of ontrats with the Corps of Engineersfirst with the Waterways Experiment Station, Viksburg, Mississippi, and more reently with the St. Louis Distrit, 21 North 12th Street, St. Louis, Missouri. The results of the ensuses on the Mississippi River were reported by Bellrose et al. (1973) and Sanderson et al. (1974, 1975, 1976, 1977, 1978, 1979, and 198). The results of the earlier ensuses of the reservoirs were reported by Sanderson (1978 and 1979). The present report presents the results of the ensuses of the reservoirs in 19798. Most of these ensuses were onduted on the return flights from Cairo after the Mississippi River was ensused. In 19798, Commonwealth Edison ontributed approximately $2, for ensusing ooling lakes at Commonwealth Edison power plants, and inois Power Company provided $43 for ensusing Clinton Lake in 197879. RESULTS The total number of eah speies ounted on eah flight and the dates of the flights are given in Table 1. The total number of eah speies ounted and the average number of eah speies ounted per flight are shown in Tables 2 and 3. These figures are not diretly omparable beause Lake Shelbyville was added in 197576 and CIPSBogota and IPClinton were added in 197879. Also, not all reservoirs were ensused during eah flight in 197879 and 19798. Mallards were always in first plae in the total number ensused during the season and in the average number seen per flight. The total ount of this speies ranged from 151,381 in 197374 to 1,145,88 in 197677. The total ount for 19798 was 833,395, up 8.4% over the total ount for the previous season. The average number of mallards per flight ranged from 16,82 in 197374 to 97,662 in 197576. The average number seen per flight in 19798 was 92,599, up 32.4% from 197879. The Canada goose was always seond both in the total number ounted for the season and the average number ounted per flight. Total ounts of Canada geese ranged from a low of 112,953 in 197374 to a high of 571,825 in 19798. The total ount for 19798 was 23.3% higher than for the previous season. The average number of Canada geese per flight ranged from 12,55 in 197374 to 63,536 in 19798. The average ount per flight was 27.7% higher in 19798 than in 197879, Other speies whose ounts averaged 1, or more per flight in one or more seasons (Table 3) were the blak duk, ommon goldeneye, ommon merganser, pintail, oot, Amerian wigeon, lesser saup, ringneked duk, anvasbak, lesser snow goose, bluewinged teal, and Amerian greenwinged teal. The two teals were the only speies on this list for the first time in 19798. The bluewinged teal made the list beause of 6,5 birds ensused on Carlyle Lake and 4,9 on Rend Lake on 25 Marh 198. There were also relatively high ounts of Amerian greenwinged teal on this same date on these two reservoirs.

Sanderson 3 The average number of waterfowl ounted per flight was slightly less than 111, in 197273 (Table 3). In 197374 the average ount delined to slightly less than 39, per flight. There were substantial inreases eah year from 197374 through 197677, when the ounts averaged slightly more than 157, waterfowl seen during eah flight. Most of this inrease ame from mallards and Canada geese and perhaps indiates the inreased use by these speies of some of the relatively new reservoirs in southern inois (Fig. 1). The average number of all waterfowl ounted per flight delined in 197778 to slightly more than 111,, probably as a result of the prolonged severe winter weather present in inois during the winter of 197778. Most of the deline in 197778 was aused by a redution of more than 46, in the average number of mallards observed per flight (Table 3). The total ount inreased slightly to about 115, in 197879, The average number of mallards inreased by about 2, from 197778 to 197879, but at the same time the average number of Canada geese delined by about 28, seen per flight. Sanderson et al. (1979) reported the highest ounts in 197879 for all speies seen during a 7year period on the Mississippi River from St. Louis to Cairo. Thus, the severe winter weather that ontinued in 197879 and the old, wet spring and floods in the spring of 1979 probably influened the distribution of the waterfowl between the reservoirs and the Mississippi River in inois in 197879. Speies showing the highest ounts per flight in 19798 for the 8year ensus period were the Canada goose, ommon goldeneye, ommon merganser, pintail, oot, Amerian wigeon, lesser saup, northern shoveler, ringneked duk, lesser snow goose, bluewinged teal, Amerian greenwinged teal, gadwall, ruddy duk, hooded merganser, and bufflehead. The inrease in Canada geese and mallards from 197879 to 19798 aounted for muh of the inrease in total waterfowl seenfrom 114,96 in 197879 to 26,215 (79,4%) in 19798. Sanderson et al. (198) reported a deline from 62,337 seen per ensus flight on the Mississippi River from St. Louis to Cairo in 197879 to 58,24 (6.6%) in 19798. Thus, the inrease in waterfowl ensused per flight on the reservoirs in 19798 over the previous season was aused to a large degree by something other than a movement of birds from the Mississippi River to the reservoirs. The high average ounts per flight for the ommon goldeneye and the ommon merganser observed in 197778 and 197879 ontinued to inrease in 19798. The high average ounts for both speies in 197879 were on 13 Deember, whereas in 19798 they were 48 January. For the first 6 seasons, the highest average ount per ensus for the oot was in 197778 (Table 3), The average ount for oots in 197879, 8,768 per flight, was 115% higher than in 197778, but the average for this speies per ensus in 19798 was 16,44, an inrease of 87. 1% over the previous season. The highest ount of oots on the Mississippi River from St. Louis to Cairo in 19798 was on 25 Marh (Sanderson et al. 198); the same date as the highest ount on the reservoirs (Table 1, page 7), During the previous season, the highest ounts of oots on the river were in late Marh and early April, whereas the highest ounts on the reservoirs were in late Otober, early November, and early Deember (Sanderson 1979),

Sanderson 4 Both total numbers (from 188,535 to 571,825) and average number seen per ensus (from 17, 14 to 63,536) inreased substantially for the Canada goose from 197879 to 19798 on these reservoirs in southern inois. There were substantial dereases in both total number and number per flight from 197778 to 197879 (Sanderson 1979). It was speulated that the severe winter weather may have been responsible for the hange. Sanderson et al. (198) reported a derease in total numbers from 162,59 to 112,855 and in average number per ensus flight from 14,781 to 11,286 from 197879 to 19798 in Canada geese on the Mississippi River from St. Louis to Cairo. In 197879, only one individual ount exeeded 1, Canada geese on a single reservoir64, on Rend Lake on 8 January 1979 (Sanderson 1979). In 19798, 13, Canada geese were ensused on Carlyle Lake on 48 January and from 12, to 94, were ounted on Rend Lake on eah of 7 flights from 2 November 1979 through 3 Marh 198. The highest ount was 94, on 4 February 198. Exept for a deline in 197879, Canada geese on end Lake have shown a fairly onsistent inrease in number ounted per flight from 197273 through 19798 (Fig. 2). In ontrast to Rend Lake, Canada geese on Lake Carlyle have remained relatively low and stable, exept for slight inreases in 197677 and 19798 (Fig. 3). The mallard showed the reverse piture. Its numbers remained relatively stable on Rend Lake from 197273 through 19798 exept for a moderate inrease in 197576 followed by a moderate deline in 197677 (Fig. 2). On Lake Carlyle, the mallard dereased from 197273 to 197374, then inreased from 2 seasons, dereased slightly from 197576 to 197677, dereased substantially from 197677 to 197778, inreased to an all time high in 197879, and delined to its levels of 197576 and 197677 in 19798. Exept for 197374 when mallard numbers were about the same on Rend and Carlyle, the mallard has been more numerous on Lake Carlyle than on Rend Lake. REFERENCES CI TED Bell rose, Frank C., Glen C. Sanderson, and Robert Crompton. 1973. Mississippi River waterfowl ensuses.. Nat. Hist. Survey. to the Waterways Experiment Station. 14pp. {typed). Lower Report Sanderson, Glen C. 1978. Waterfowl ensuses on ertain reservoirs in southern lllinois197273 through 197778. 111. Nat. Hist. Survey. 4pp., 3 tables, 3 figures {typed). 1979. Waterfowl ensuses on ertain reservoirs in southern 111 inois197879. 111. Nat. Hist. Survey. 5pp., 3 tables, 3 figures {typed)., Frank C. Bell rose, and Robert Crompton. 1974. Waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois: 6 Deember 1973 through 2 April 1974. 111. Nat. Hist. Survey. Report to the Waterways Experiment Station. 2pp., 2 tables {typed).

Sanderson 5 l,, and 1975. Waterfowl ensuses on the Mississippi, River from St. Louis, Missouri, to Cairo, inois: 4 Deember 1974 through 26 Marh 1975. 111. Nat. Hist. Survey. Report to the U.S. Army Corps of Engineers, St. Louis Distrit. lp., 2 tables {typed).,, and 1976. Waterfowl ensuses on the Mississippi...,,... River from St. Louis, Missouri, to Cairo, inois: 19 November 1975 through 12 April 1976. 111. Nat. Hist. Survey. Report to the U.S. Army Corps of Engineers, St. Louis Distrit. 3pp., 2 tables {typed).,, and 1977. Waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois: 28 Otober 1976 through 13 April 1977. Report to the U.S. Army Corps of Engineers, St. Louis Distrit. 4pp., 3 tables (typed).,, and 1978. Waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois: 4 November 1977 through 12 April 1978. Report to the U.S. Army Corps of Engineers, St. Louis Distrit. 4pp., 3 tables {typed).,, and 1979. Waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois: 27 Otober 1978 through 9 April 1979. Report to the U.S. Army Corps of Engineers, St. Louis Distrit. 5pp., 3 tables (typed).,, and 198. Waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois: 15 November 1979 through 1 April 198. Report to the U.S. Army Corps of Engineers, St. Louis Distrit. 6pp., 3 tables {typed).

L Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apr i 1 198 Canada goose., Q).:L. (I) (I) ro.:l...j a 4 ro (I) (I) Q).µ : Ol..J (I).:L..:L..Y. : ro ro ro Ol.µ..J (I)..J..J : L...Y. o a. L.. > (I) ro : V}.. >..J (I) I u u. > 3 (I) (I) CT>, "'O 4 V}.:L. : Q) L.. : 4.. 11) ro.. IO (I) ro.. _I V} V) u :: o u u Total 15 Nov 79 3 15 8 1,6 1,4 2,6 1, 3 2, 1 9,26 3 Nov 79 15 175 4 3,8 12, 1, 8 1, 8 1 2,225 13 De 79 85 13 fog 4,6 32, 2,4 35 fog 525 39,775 48 Jan 8 2 8 13, 44, 6,5 4 45 64,63 21 Jan 8 4 2,7 7,5 87, fog 4 fog 98, 4 Feb 8 8 6 7 94, 6,2 2, 1 13,68 18 Feb 8 4 7 8, 79, 6,5 5 94,74 3 Mar 8 125 1, 68, 54, 3, 8 1,4 128,325 25 Mar 8 2 8 4,8 2,3 2 6 5, 1 13, 1 1 Apr 8 3 6 9 : L.. Q) : ro V) Total 93 5,735 56 112, 45,7 29,23 35 7,9 9,735 571, 825 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 Apri 1. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apri 1 198mal lard. Q) Q) Q) l'o...i a 4 l'o Q) Q) Q) Ol...I Q) l'o l'o ro C1l...I Q)...I...J : L o a. L > Q) ro Qj I u v,..s::: >...J u.d > :?. Q) Q) en "O 4 v, Q) L 4.. ro (l).. ro Q) l'o a....j v, v, u o:'. o:l u u Total 15 Nov 79 1,2 25, 3,8 84, 15, 4, 4 19, 12, 2,4 3 Nov 79 5,4 32, 1, 9 123, 22, 49, 65 33, 8,5 274,865 13 De 79 2,7 19, fog 81, 9, 36, 85 fog 4,6 152,385 N 48 Jan 8 4 1, 1, 3 18, 6,4 15, 275 14, 16, 81,375 21 Jan 8 85 6, 1 3 8, 4,3 fog 275 2,8 fog 22,625 4 Feb 8 75 3,8 1 5 5,3 65 6,2 16,715 18 Feb 8 1,4 7,8 3 1 7, 3,2 19,8 3 Mar 8 1,8 8,4 7 1,4 6,2 225 7,5 1, 1 27,325 25 Mar 8 45 9 8,9 1,5 6 65 4,2 9,8 35,415 1 Apr 8 75 2, 1 2,85 L (I) "'O C'tJ v, Total 14,95 113, 7,3 324, 69,2 159,85 1, 95 39,9 54, 1 833,395 a =<:unts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 Apri 1. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198 blak duk. '"C Q)..!(. Q) Q)..!(. _J ttj a... (!) (l) (l.).µ Ol _J (l.)..!(. o ttj O'l.µ _J Q) _J _J L...!(. (1.) a. L. > Q) Q) I u V). > _J u.d > 3 Q) Q) Ol "O '"O... V) : L. :..... o. o ) o.. I V) V) u ::: ro u u Total 15 Nov 79 4 5 75 l,3 3 7 5 3 25 3,47 3 Nov 79 15 6 4 2, l 3 8 5 5 15 4,645 13 De 79 4 3 fog 2,5 2 4 2 fog 6 3,52 CV'\ 48 Jan 8 25 275 75 3 175 2 2 2 3 l,57 21 Jan 8 2 125 15 15 1 fog 1 6 fog 48 4 Feb 8 2 75 1 5 1 125 38 18 Feb 8 35 15 2 15 6 415 3 Mar 8 4 175 25 3 1 15 125 25 535 25 Mar 8 2 15 15 175 25 5 6 2 65 1 Apr 8 3 5 8 Total 39 2,215 25 6,555 1,33 2,55 8 1,43 1,35 15,745 aunts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., l Nov., 3 Apr., and 22 Apr.

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198ommon goldeneye. "'O <I) <I) <I) ro..j IU a 4 <I) <I) <I).µ : en..j Q) : en.µ..j Q)..J..J : I.. o a. I.. > (I) ro : : V).: >..J Q) I u u. > 3 <I) (I) en 4 V) Q) I.. : 4 o_ rt).: ro (I) ro a....j V) V) u CY.". a:) u u Total 15 Nov 79 65 5 1 7 2 25 75 1,215 3 Nov 79 8 225 25 2,8 1,4 2 175 25 5,38 13 De 79 575 3 fog 3,3 2, 1 45 2 fog 375 7, 12 ::t" 48 Jan 8 175 475 5 1, 5,8 175 3 9 18,325 21 Jan 8 35 175 25 1, 1 7 fog 175 fog 2,75 4 Feb 8 225 3 75 4 1,2 125 2,325 18 Feb 8 55 9 1, 175 2,625 3 Mar 8 325 5 1 4 75 75 15 2,3 25 Mar 8 25 4 3 25 4 2 225 9 1 Apr 8 85 85 : I.. <I) "'O : o V) Total 2,37 2,965 1, 1 18,375 11,25 3,84 2 1,45 2,6 43,25 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 Apri 1. Additional ensuses were made on 15 Ot., l Nov., 3 Apr., and 22 Apr.

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apri 1 198 ommon merganser. (!) ::,(. (!) (!) ro ::,(...J ltl 4 ltl Q) (!) Q).µ : Ol..J (I) ::,(. ::,(. ::,(. : ro ro ro O'l.µ VI..J (!)..J..J : L. ::,(. OJ a. L. > (l) ro : : v,. >..J (!) I u u.d > 3 Q) (I) Ol "'O 4 v, ::,(. : Q) L. : 4.. m ro. ro Q) ro.. 1 v, v, u o w u u a Total. 15 Nov 79 2 15 25 175 5 285 3 Nov 79 25 5 8 9 5 75 3 75 1, 735 Lt\ 13 De 79 15 8 fog 1,4 8 175 fog 8 2,685 48 Jan 8 65 8 275 4,5 2,3 85 125 375 7,85 21 Jan 8 8 4 4 35 25 fog 3 fog 79 4 Feb 8 1 125 15 1 3 2 66 18 Feb 8 175 35 35 4 915 3 Mar 8 8 15 2 75 2 2 4 585 : VI L. Q) "'O : m v, 25 Mar 8 1 15 4 75 1 1 75 325 1 Apr 8 15 15 Total 75 95 42 7,4 4, 15 1,285 275 66 15,8 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr. tr (

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198pintail. (I).::I. (I) (I) ro.::i...j l'j a 4 (1J a, (I) a,.µ Ol..J (I).::t..::I..::I. (ti IO IO Ol.µ VI..J a,..j..j '.::t. o:l a. ' > (I) (1J v,. >..J a, I u u.d > 3 Q) Q) en "O 4 v,.::t. a, ' 4.. IO IO. IO a, IO.. ' v, v, u er.: o:l u u Total 15 Nov 79 8 6 2,5 l,2 2,9 1, 8,46 3 Nov 79 3 8 2 5 4 2,2 " 13 De 79 125 fog 5 1 3 fog 1,25 48 Jan So 1 2 1 4 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 6 6 3 Mar 8 6 1 16 VI ' Q) (ti v, 25 Mar 8 15 5,7 3,6 5 1 I,5 11, l 1 Apr 8 85 6 145 Total I, 375 6 9,6 5,36 3,895 1,6 1,66 23,55!!ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.

Tablet. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198oot.... Vl L. Q) "'O l'c (/) "'O Q)..::/.. Q) Q)..::/....J l'j a 4 IU Q) Q) Q).µ : O'I..J Q)..::/....::/...::L. : IU l'o l'c O')... L...::/.. o..j (!)..J..J. L. > Q) l'c : : Q) I u Vl V)..: >..J u.d > 3 Q) Q) 1 "'O "'O 4 V)..::/.. : Q) L. 4.. m l'o..: Q)!ti a.. ' V) (/) u ::: C'.) u u Total 15 Nov 79 25 3,5 6 5, 2, 4, 1 2,3 15, 32,75 3 Nov 79 5 5 1 3, 6,5 1, 7 15 1, 4 13,4 13 De 79 2 fog 4,5 2,2 6 fog 1 7,6 48 Jan 8 75 1 3 2 175 85 21 Jan 8 5 2 1 2 fog 4 8 fog 1,39 4 Feb 8 5 1 15 18 Feb 8 1 1 3 Mar 8 3 3 25 Mar 8 8 4,5 19, 25, 12, 5 3, 1 21, 85,9 1 Apr 8 1,6 3,6 5,2 Total 1, 15 9,25 7 31, 7 36,2 2,6 79 7,375 4, 1 147,64. _ unts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.,,.

Tablet. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, to April 198Amerian wigeon. Q)..::(. Q) Q) ro..::(...j IU a 4 ro Q) Q) Q).µ : O'l..J Q)..::(...::(...::(. ro ro re O'l.µ VI L...::(. o::i..j Q)..J..J :.. L. > Q) ro : : Vl. >..J Q) I u u.d > 3 Q) Q) en "O 4 Vl.::t. OJ L. : 4 a.. re ltl. ltl Q) re a.. l Vl V') u ex:: o:l u u Total 15 Nov 79 6 5,9 5 8,5 6, 5,5 5,8 t,2 33,46 3 Nov 79 5 t,2 15 3,5 t,2 t,8 t, 3 9,2 13 De 79 5 fog t, 7 4 7 fog 25 3,55 48 Jan 8 3 2 5 3 1 275 1,675 21 Jan 8 too 2 4 fog 2 fog 9 4 Feb 8 2 2 too 5 18 Feb 8 15 15 3 Mar 8 too 175 3 15 725 : Vl L. (I) : ro Vl 25 Mar 8 75 15 4,5 6,3 2 1, 3,9 t 6, t 25 1 Apr 8 25 9 t, t 5 Total 185 8,35 65 18,6 14,9 9,275 8,5 6,975 67,435 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr....

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198 lesser saup. "'O Q)...I I'll C')...I Q) o o o m.µ...i Q)...I...I,_..Y. o Q) Q) ro a 4 ro (!) (!) (!).µ,_. > Q) o v,.. >...I Q) I u u. >? (l) Q) Ol "'O "O 4 (/) QJ,_ 4 a. o ro.. ro (!) _, l'j a. v, (/) u. o u u Total 15 Nov 79 115 275 55 2,7 1,2 125 15 1, 3 6,415 3 Nov 79 115 65 2 1,3 65 3 85 35 3,65 CT\ 13 De 79 fog 55 225 175 fog 95 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8,_ QJ "'O ro (/) 25 Mar 8 l, 3 2 9,5 6,2 5,8 15 11,6 34,75 1 Apr 8 175 l, 1 1,275 Total 1,53 54 75 14,5 8,275 6,575 385 14,35 46,455!!ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., l Nov., 3 Apr., and 22 Apr. ft..

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198northern shoveler. "'C Q).::I. Q) Q) IIJ.::I....I ro a 4 IIJ Q) Q) (I).µ : )...I Q).::I..::I..::I. l'o ro ).µ : IIJ...I Q)...I...I : I...::I. o. I.. > Q) l'o : : (/).s::: >...I Q) I u u.. > 3 (I) Cl) ) "'C "'O 4 (/).::{. : (I) I.. : 4 a. IIJ l'o.s::: l'o Q) ro a...j (/) (/) u er: C'.l u u Total 15 Nov 79 3 Nov 79 13 De 79 fog fog 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 : I.. Q) : ro (/) 25 Mar 8 5 75 9 1,3 15 1 9 3,475 1 Apr 8 4 4 Total 5 75 9 1, 3 55 1 9 3,875!!.ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr. _..

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198ringneked duk. (\).:L (I) (I) o.y....i I'll a \I ftj (I) (\) (\).µ :,...I (\).Y..:L.:L : o ftj IC 1.µ VI...I (I)...I...I L.Y. o a. L > (\) o ti).s:: >...I (\) I u u.. >? (\) (\), "'O \I ti).y. : (\) L :... IO It).s:: It) (\) It) a.. 1 ti) ti) u o:'. ro u u Total. 15 Nov 79 5 8 175 6 9 4 3 1,5 3,375 3 Nov 79 4 3 125 325 275 75 4 125 1,35 13 De 79 fog 2 75 4 fog 315 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 IJ'I L (\) rtj ti) 25 Mar 8 35 75 4,4 7,5 1,5 3 4, 1 17,955 1 Apr 8 125 65 775 Total 44 185 3 5,525 8,75 1, 78 1 6,375 23,455 aunts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr..,

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, JO April 198anvasbak. Q)..::L. Q) Q) II]..::L....I a 4 Q.) Q) Q.).µ m...i Q)..::L...::L...::L. ltl ltl ro m.µ VI...I Q)...I...I I....::L. ::,. I.. > Q) ltl : V).s:: >...I Q) I u u.. > 3 Q.) Q) m '"O "O 4 V)..::L. OJ I.. 4.. IU ro.s:: ltl Q.) ro.....i V) V) u :: O'..'I u u Total 15 Nov 79 35 2 5 375 975 3 Nov 79 65 325 1 1,75 13 De 79 fog 15 375 4 fog 565 N 48 Jan 8 3 3 21 Jan 8 1 fog fog 1 4 Feb 8 18 Feb 8 3 Mar 8 35 15 6 75 32 25 Mar 8 JOO 8 45 2 9 2,45 JO Apr 8 45 1 145 Total 135 1 2,25 1,5 495 75 1,375 5,93 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on l5 Ot., I Nov., 3 Apr., and 22 Apr. 6,

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198lesser snow goose. Q) Q) Q) l'o...j C'O a Ol..J Q) : l1j l'o ra Ol.µ L. o 4 l1j (!) Q) (!).µ :...J Q)...J...J a. L. > Q) l1j l/). >..J Q) I u u. > 3 Q) Q) Ol 4 l/) Q) L. 4.. ro C'O. IC (I) l'ij....j l/) l/) u :: ro u u Total 15 Nov 79 3 125 6 8 1, 4 1,2 4,425 3 Nov 79 75 4 65 1,2 9 8 3 3,38 "" 13 De 79 25 fog 1, 8 9 fog 75 2,8 48 Jan 8 4 2 5 5 1, 15 21 Jan 8 4 6 fog fog 1, 4 Feb 8 5 3 8 1, 15 18 Feb 8 1, 1, 3 Mar 8 25 3 5 4 5 1,275 25 Mar 8 25 6 2 1 3 8 2,25 1 Apr 8 1 15 25 Total 1 39 19 4,55 4,3 5,51 1,5 2, 14 18,238 aunts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.,.

L.... Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198redhead. (I).:L. (I) (I) to.:l...j to a 4 to (!) (I) (!).µ : Ol..J (I).Yo.Y..:L. : IO to IO O'I.µ..J (I)..J..J : '.Y. o a. ' > (I) IO : V)..: >..J (I) I u u.a > 3 (I) (I) en "O 4 V).Y. (I) ' 4.. IO IO..: IO (I)....J V) V) u :: o u u "' Total \ 15 Nov 79 6 3 75 165 3 Nov 79 1 4 15 155 13 De 79 fog 25 8 fog 15..:r 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 2 1 35 65 1 Apr 8 Total 385 25 15 425 1, 75 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.. t'

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198bluewinged teal. "O Q).x. Q) Q) ro.::l....i ro a 4 fu Q) (I) Q).µ : Ol...I Q).::L..::L..::L. : fu ro ro Ol.µ...I Q)...I...I '.x. o a. ' > Q) ro V)..: >...I Q) I u u. > 3 Q) Q) Ol "O "O 4 V).::L. Q) ' 4 n. fu ro..: ro Q) ro.....i V) V) u :: ro u u Total. I.I'\ 15 Nov 79 5 5 3 Nov 79 13 De 79 fog fog 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 125 4 6,5 4,9 1 5 8 I,2 14,75 1 Apr 8 6 8 1,4 I 11 l! 1 1 Total 125 4 6,5 4,9 7 5 8 2,5 15,525!!.ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr. 4

r Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198Amerian greenwinged teal. G) G) G) l'o.y. ' l'o a I.I l'o Q) Cl) Q).µ :.µ ' G) _J ' : a. I > G) ro : : V>.: > _. Q) I u u. > 3 G) G) Ol I.I V>.Y. : Q) I : I.I.. l'o ro.: ro (!) ro.. _. Ol Q).Y..Y..Y. : l'o l'o l'o Ol I.Y. IX) _. V> v, u :: ro u u Total \ 15 Nov 79 2 75 1,3 8 3 4 4 3,475 3 Nov 79 5 1 4 3 85 " 13 De 79 fog fog 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 15 1,8 1,5 25 275 4 4, 15 1 Apr 8 25 375 625 Total 4 75 3,2 2,7 875 675 1, 175 9, 1 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.

Table I. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apri I 198 gadwall. '"C Q) Q) Q) IO...I rj a...i Q)...I...I I.. ) 4 IO (!) Q) (!)... O'I...I Q) IO IO IO O'l... a. I.. > Q) IO V1.. >...I Q) I u u. > 3 (!) Q) Ol '"C '"O... V') Q) I........ IO IO.. IO Q) ro......i V') v, u ex: a:) u u Total.. ;;11 i 11! 15 Nov 79 2 8 4 5 6 1 2,6 3 Nov 79 75 3 1 2 4 1,75 r.. 13 De 79 fog fog 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 3 1, 1,5 5 75 3 2,955 JO Apr 8 25 35 6 Total 35 2, 1 2, 775 1,75 435 6,69!!ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., I Nov., 3 Apr., and 22 Apr.

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, JO Apri 1 198ruddy duk. l,i "'O Q) Q) Q) m...j m a 4 Q) Q) Q).µ Ol...J "' Q) m m Ol.µ...J "' a,...j...j 1 o. 1 > Q) (/). >...J Q) I u u.d > 3 Q) Q) Ol "'O "O 4 (/) ) 1 4.. m ro. m Q) m.....j (/) (/) u ::: u u "' Total..,ii 15 Nov 79 25 4 85 5 4 24 3 Nov 79 15 6 5 25 4 19 13 De 79 fog 25 75 fog 1 48 Jan 8 3 3 21 Jan 8 JOO fog fog JOO 4 Feb 8 18 Feb 8 3 Mar 8 35 15 6 75 32 25 Mar 8 1 8 45 2 25 I,575 1 Apr 8 45 45 Total 16 1 I 5 4 1,27 775 35 1 15 2,87 2<:ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and JI April. Additional ensuses were made on.15 Ot., 1 Nov., 3 Apr., and 22 Apr. t

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198hooded merganser. Q) Q) Q) IO..J ltj a 4 IO (!) (!) (!).µ rn..j (1)..:.::.:L. IO ltj IO rn.µ VI..J (1)..J..J I..:.:: o a. I > Q) U').s:: >..J Q) I u u. >?. Q) (1) en "'C 4 U') Q) I 4.. IO.s:: IO Q)....J U') U') u :: ro u u Total 15 Nov 79 15 15 55 2 24 3 Nov 79 15 25 1 75 35 25 O"\ 13 De 79 15 fog 15 1 25 fog 29 48 Jan 8 15 15 75 2 3 85 375 21 Jan 8 4 75 fog fog 115 4 Feb 8 2 4 6 18 Feb 8 25 5 75 3 Mar 8 15 15 25 Mar 8 15 5 25 2 11 1 Apr 8 Total 6 85 15 64 45 19 3 15 1,53 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., l4 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr. ti,

Table I. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198bald eagle. Q) Q) Q)!ti..J o a 4 l1j Q) Q) Q).µ : _. Ol Q).::. : l1j!ti l1j Ol.µ...J Q)..J..J : Cl. L. > Cl)!ti : : V). >,..J Cl) I u L. o u.d >, 3: Q) II.I Ol "O 4 V) _. V) V) u ex: ro u u : Q) L. : 4 o_!ti!ti.!ti II.I ro.. Total. 15 Nov 79 3 Nov 79 2 3 I 7 4 17 13 De 79 1 fog 9 5 fog 15 48 Jan 8 2 2 N 21 Jan 8 fog fog 4 Feb 8 2 2 18 Feb 8 3 Mar 8 25 Mar 8 1 2 3 JO Apr 8 : L. Q) a Total 8 3 1 16 9 2 39 :.::.Counts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., CJ') 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr. \.

II L Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198bufflehead. "'Cl Q).::l. Q) Q) ro.::l. _J l'o a 4 ro (!) (lj Q).µ Ol _J Q).::l..::l..::l. ro ro Ol.µ (I) _J _J. _J Ul I...Y. ).. I.. > Q) ro V). > _J Q) I u l).. > 3 Q) (!) Ol "'O 4 V).::l. a.> I.. 4.. ro. ro (!) ro.. 1 V) V) u :: ro u u Total 15 Nov 79 4 3 1 75 2 445 3 Nov 79 3 4 1 5 58 13 De 79 fog 2 75 5 fog 325 N 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 4 2 75.o 25 3 64 1. Apr 8 5 5 1 Ul I.. (!) "'Cl V) Total 8 6 9 325 15 25 55 2,9.::.Counts a reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 Apr i 1. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr.

Table l. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198redbreasted merganser. Q).::I. Q) Q).::I....I a 4 Q) (!.) (!.).µ O'l...I Q).::I..::I..::I. o o o O'l.µ...I Q)...I...I u. > 3 Q) Q) O'l "O 4 u,.::i. Q) I.. 4.. o.s:: o Q),,, a.. I...::I. o a. I.. > Q) o u,.s:: >...I Q) I u...i u, u, u :: a:) u u Total ' I 15 Nov 79 3 Nov 79 N 13 De 79 fog 15 75 fog 225 N 48 Jan 8 2 1 3 21 Jan 8 75 5 fog fog 125 4 Feb 8 6 6 18 Feb 8 3 Mar 8 25 Mar 8 1 Apr 8 U') I.. Q) "O o u, Total 425 225 6 71 ounts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 April. Additional ensuses were made on 15 Ot., l Nov., 3 Apr., and 22 Apr. \

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apri 1 198 ormorant. Q).Y. Q) Q) ro.y....j IO a 4 fu (I) <lj Q).µ O'I...J Q).Y..Y..Y. Cll...J Q)...J...J I...Y. o fu ro IO O'I.µ.. I.. > Q) ro V'l.. >...J (1) I u u. > 3 (1) Q) O'I 4 V').Y. (1) I.. 4 Cl. IO ro. ro (1) ro Cl. _. v, V'l u :: :) u u Total 15 Nov 79 3 Nov 79 13 De 79 fog fog <""I 48 Jan 8 N 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 3 3 1 Apr 8 Cll I.. (I) "'O ro V'l Total 3 3.::.Counts a reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan., 14 Mar., 26 Mar., and 11 Apri 1. Additional ensuses were made on 15 Ot., 1 Nov., 3 Apr., and 22 Apr. (

Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 April 198ommon loon. '"O (I).!:{. (I) (I) o.!:{. _J l'j a 4 o Q) OJ a.>.µ O'l _J (I).!:{..!:{..:L. o o!tl O'l.µ VI _J (I) _J _J!....:L. o a.!... > (I) o (I) I u V). > _J u. > 3 OJ Cl) O'l "O 4 V).:L. OJ!... 4 o_ rt) rt). rt) (I) IIJ a.. _J U') U') u :: CD. u u Total, I 15 Nov 79 3 Nov 79 13 De 79 fog fog..:t" N 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar 8 12 12 1 Apr 8 Total 12 12 VI!... (I) "O a.::.counts reorded here were made, in hronologial order, on 8 Nov., 27 Nov., 13 De., 3 Jan., 21 Jan.,!tl U') 14 Mar., 26 Mar., and 11 Apri I. Additional ensuses were made on 15 Ot., I Nov., 3 Apr., and 22 Apr. \

Sanderson Table 2. A omparison of the waterfowl ensuses on some of the reservoirs in southern inois 197273 through 19798. Number Counted on Aerial Flights Speies 197273 197374 197475 197576 197677 197778 197879 19798 Vl s... Q) "C ro.n Canada Goose 155,713 112,953 25,37 243,93 482,395 493,345 188,535 571,825 Ma 11 ard 73,39 151, 381 545,264 1,74,277 1, 145, 88 542, 13 768,99 833,395 Blak Duk 31,56 5,93 15,562 32,896 21, 155 11,83 12,76 15,745 Common Goldeneye 13,376 4,857 11,589 12,384 21,458 39,71 41,36 43,25 Common Merganser 7,243 4,935 7,247 5,67 8,91 11, 12 16,41 15,8 Pintail 6,245 3,5 3,855 16,586 29,87 6,85 13, 1 23,55 Coot 26,465 31,7 17,886 43,66 31,57 44,865 96,45 147,64 Amerian Wigeon 2,85 9,455 11, 191 36,526 46,87 12,57 56,93 67,435 Lesser Saup 24,238 7,83 3,45 8,31 23,35 22,75 16, 125 46,455 Northern Shoveler 193 1,95 15 1,877 3,386 1,825 74 3,875 Ringneked Duk 9,763 3, 13 469 12,28 18,75 15,29 8,99 23,455 Canvasbak 2, 145 1, 115 3,5 13,38 2,49 4,555 5,896 5,93 Lesser Snow Goose 5,92 2,567 4,561 14,781 9,979 5,965 11, 995 18,238 Redhead 95 3,7 75 97 6,25 13 8 1,75 Bluewinged Teal 875 1,87 63 3, 776 9,213 3,865 3,445 15,525 Amerian Greenwinged Teal 42 13 65 1, 779 5,558 3,525 8,965 9, 1 Gadwa 11 4,335 3,37 681 2,491 3,483 1,995 4,31 6,69 Ruddy Duk 1,44 12 12 35 56 61 1,25 2,87 Hooded Merganser 43 143 85 145 1,85 1,53 Bald Eagle 13 39 4 81 32 22 51 39 Bufflehead 43 2,5 2,9 Table 2 ontinued. \

Table 2. Continued page 2. Wood Duk 43 65 Small Canada Geese 3,475 Redbreasted Merganser 1,13 Cormorant 27 Mute Swan 2 Common Loon 71 3 12 In 197576, 197778, and 197879 1 extra early and 1 extra late flight were made, in 197677 another earlier flight was added, in other years 9 flights were made. VI L.. (!) "C C'O (/)

Table 3. A omparison of the number of waterfowl ounted per flight on some of the reservoirs in southern lllinois197273 through 19798. Number Counted per Aerial Flight Speies 197273 197374 197475 197576 197677 197778 197879 19798 Canada Goose 17,31 12,55 27,819 22, 175 4,2 44,85 17, 14 63,536 Ma 11 a rd 78, 154 16,82 6,585 97,662 95,49 49,284 69,98 92,599 Blak Duk 3,57 656 1, 729 2,99 1, 763 1,75 1,16 l, 749 Common Goldeneye 1,486 54 1,288 1, 126 1, 788 3,61 3,76 4,78 Common Merganser 85 548 85 515 674 1, 11 1,492 l, 756 Pintail 694 389 428 1,58 2,424 553 1, 191 2,617 Coot 2,94 3,452 l,987 3,915 2,631 4,79 8,768 16,44 Amerian Wigeon 312 1,5 l,243 3,32 3,84 l, 143 5, 175 7,493 Lesser Saup 2,693 87 378 73 1, 942 2,7 1,466 5, 162 Northern Shoveler 21 212 12 171 282 166 67 43 Ringneked Duk 1,82 348 52 1, 116 1, 559 1,39 817 2,66 Canvasbak 238 124 389 1,21 1,671 414 536 659 Lesser Snow Goose 658 285 57 1,344 832 542 1, 91 2,26 Redhead 16 411 8 88 521 12 73 119 Bluewinged Teal 97 28 67 343 768 351 313 1, 725 Amerian Greenwinged Teal 47 14 7 162 463 32 815 1,11 Gadwa 11 482 374 76 226 29 181 392 743 Ruddy Duk 16 13 1 28 47 55 93 319 Vl I.. Q) Hooded Merganser 5 13 7 13 99 17 Bald Eagle 1 4 4 7 3 2 5 4 o V) Bufflehead 48 186 232 Table 3 ontinued.

Table 3. Continued page 2. Wood Duk 5 6 Small Canada Geese 316 Redbreasted Merganser 13 79 Cormorant 2 3 Mute Swan Ll Common Loon 1 Mean 11,836 38,866 97,387 138,649 157, 191 111, 58 114, 96 26,215 In 197576, 197778, and 197879 1 extra early and 1 extra late flight were made, in 197677 another earlier flight was added, in other years 9 flights were made. 11 reservoirs listed in Table 1 were ensused on all flights eah year exept as follows: Shelbyville Lake was not ensused in 197273 and 197374 and was ensused only on 4 of 11 flights in 197576 and 11 of 12 flights in 197677; CIPSBogota and IPClinton were not ensused until 197879; and in 197879 Lake Springfield, Lake Shelbyville, Lake Carlyle, Rend Lake, and CIPS Bogota were eah ensused only 5 of 11 flights; Baldwin Lake only 1 of 11; and Coffeen Lake and IPClinton only on 4 of 11 flights. In 19798, Shelbyville Lake was ensused 4 times, CIPSBogota 8 times, and IPClinton 7 times. VI I.. Q) ro Vl noes not inlude the bald eagle, ormorant, mute swan, or ommon loon.

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