WATERFOWL CENSUSES ON CERTAIN RESERVOIRS IN SOUTHERN ILLINOIS INTRODUCTION

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1 /C'II I ;LEN C.. s,nderson WATERFOWL CENSUSES ON CERTAIN RESERVOIRS IN SOUTHERN ILLINOIS Glen C. Sanderson, Head Setion of Wildlife Researh inois Natural History Survey Urbana, inois August 198 INTRODUCTION From the fall of 1972 through , 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 through the 7 reservoirs were ensused eah year for waterfowl. In , 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 , 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 , and 11 flights were made in eah of and , 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 ), 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

2 Sanderson 2 From through 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 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 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 and CIPSBogota and IPClinton were added in Also, not all reservoirs were ensused during eah flight in and 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 to 1,145,88 in The total ount for 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 to 97,662 in The average number seen per flight in was 92,599, up 32.4% from 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 to a high of 571,825 in The total ount for was 23.3% higher than for the previous season. The average number of Canada geese per flight ranged from 12,55 in to 63,536 in The average ount per flight was 27.7% higher in than in , 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 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.

3 Sanderson 3 The average number of waterfowl ounted per flight was slightly less than 111, in (Table 3). In the average ount delined to slightly less than 39, per flight. There were substantial inreases eah year from through , 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 to slightly more than 111,, probably as a result of the prolonged severe winter weather present in inois during the winter of Most of the deline in 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 , The average number of mallards inreased by about 2, from to , 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 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 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 Speies showing the highest ounts per flight in 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 to aounted for muh of the inrease in total waterfowl seenfrom 114,96 in to 26,215 (79,4%) in Sanderson et al. (198) reported a deline from 62,337 seen per ensus flight on the Mississippi River from St. Louis to Cairo in to 58,24 (6.6%) in Thus, the inrease in waterfowl ensused per flight on the reservoirs in 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 and ontinued to inrease in The high average ounts for both speies in were on 13 Deember, whereas in they were 48 January. For the first 6 seasons, the highest average ount per ensus for the oot was in (Table 3), The average ount for oots in , 8,768 per flight, was 115% higher than in , but the average for this speies per ensus in 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 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),

4 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 to on these reservoirs in southern inois. There were substantial dereases in both total number and number per flight from to (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 to in Canada geese on the Mississippi River from St. Louis to Cairo. In , 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 , Canada geese on end Lake have shown a fairly onsistent inrease in number ounted per flight from through (Fig. 2). In ontrast to Rend Lake, Canada geese on Lake Carlyle have remained relatively low and stable, exept for slight inreases in and (Fig. 3). The mallard showed the reverse piture. Its numbers remained relatively stable on Rend Lake from through exept for a moderate inrease in followed by a moderate deline in (Fig. 2). On Lake Carlyle, the mallard dereased from to , then inreased from 2 seasons, dereased slightly from to , dereased substantially from to , inreased to an all time high in , and delined to its levels of and in Exept for 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 Mississippi River waterfowl ensuses.. Nat. Hist. Survey. to the Waterways Experiment Station. 14pp. {typed). Lower Report Sanderson, Glen C Waterfowl ensuses on ertain reservoirs in southern lllinois through Nat. Hist. Survey. 4pp., 3 tables, 3 figures {typed) Waterfowl ensuses on ertain reservoirs in southern 111 inois Nat. Hist. Survey. 5pp., 3 tables, 3 figures {typed)., Frank C. Bell rose, and Robert Crompton Waterfowl ensuses on the Mississippi River from St. Louis, Missouri, to Cairo, inois: 6 Deember 1973 through 2 April Nat. Hist. Survey. Report to the Waterways Experiment Station. 2pp., 2 tables {typed).

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

6 L Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apr i 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.. : ) ro.. IO (I) ro.. _I V} V) u :: o u u Total 15 Nov ,6 1,4 2,6 1, 3 2, 1 9,26 3 Nov ,8 12, 1, 8 1, 8 1 2, De fog 4,6 32, 2,4 35 fog , Jan , 44, 6, ,63 21 Jan 8 4 2,7 7,5 87, fog 4 fog 98, 4 Feb , 6,2 2, 1 13,68 18 Feb , 79, 6,5 5 94,74 3 Mar , 68, 54, 3, 8 1,4 128, Mar ,8 2, , 1 13, 1 1 Apr : L.. Q) : ro V) Total 93 5, , 45,7 29, ,9 9, , 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.

7 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, 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, , 16, 81, Jan , 1 3 8, 4,3 fog 275 2,8 fog 22,625 4 Feb , ,3 65 6,2 16, Feb 8 1,4 7, , 3,2 19,8 3 Mar 8 1,8 8,4 7 1,4 6, ,5 1, 1 27, Mar ,9 1, ,2 9,8 35,415 1 Apr , 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.

8 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 l, ,47 3 Nov , l , De fog 2, fog 6 3,52 CV'\ 48 Jan l,57 21 Jan fog 1 6 fog 48 4 Feb Feb Mar Mar Apr Total 39 2, ,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.

9 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 ,215 3 Nov ,8 1, ,38 13 De fog 3,3 2, fog 375 7, 12 ::t" 48 Jan , 5, , Jan , 1 7 fog 175 fog 2,75 4 Feb , , Feb , 175 2,625 3 Mar ,3 25 Mar Apr : 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.

10 Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apri 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 Nov , 735 Lt\ 13 De fog 1, fog 8 2, Jan ,5 2, ,85 21 Jan fog 3 fog 79 4 Feb Feb Mar : VI L. Q) "'O : m v, 25 Mar Apr Total ,4 4, 15 1, ,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 (

11 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 ,5 l,2 2,9 1, 8,46 3 Nov ,2 " 13 De fog fog 1,25 48 Jan So Jan 8 fog fog 4 Feb 8 18 Feb Mar VI ' Q) (ti v, 25 Mar ,7 3,6 5 1 I,5 11, l 1 Apr Total I, ,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.

12 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 ,5 6 5, 2, 4, 1 2,3 15, 32,75 3 Nov , 6,5 1, , 4 13,4 13 De 79 2 fog 4,5 2,2 6 fog 1 7,6 48 Jan Jan fog 4 8 fog 1,39 4 Feb Feb Mar 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, , 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.,,.

13 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 ,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, fog 25 3,55 48 Jan , Jan 8 too 2 4 fog 2 fog 9 4 Feb too 5 18 Feb Mar 8 too : Vl L. (I) : ro Vl 25 Mar ,5 6,3 2 1, 3,9 t 6, t 25 1 Apr t, t 5 Total 185 8, ,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....

14 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 ,7 1, , 3 6,415 3 Nov , ,65 CT\ 13 De 79 fog fog 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, ,6 34,75 1 Apr l, 1 1,275 Total 1, ,5 8,275 6, ,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..

15 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 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 , ,475 1 Apr Total , ,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. _..

16 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 ,5 3,375 3 Nov ,35 13 De 79 fog fog Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 IJ'I L (\) rtj ti) 25 Mar ,4 7,5 1,5 3 4, 1 17,955 1 Apr Total ,525 8,75 1, ,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..,

17 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 IU ro.s:: ltl Q.) ro.....i V) V) u :: O'..'I u u Total 15 Nov Nov ,75 13 De 79 fog fog 565 N 48 Jan Jan 8 1 fog fog 1 4 Feb 8 18 Feb 8 3 Mar Mar 8 JOO ,45 JO Apr Total ,25 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,

18 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 , 4 1,2 4,425 3 Nov , ,38 "" 13 De fog 1, 8 9 fog 75 2,8 48 Jan , Jan fog fog 1, 4 Feb , Feb 8 1, 1, 3 Mar , Mar ,25 1 Apr Total ,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.,.

19 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 Nov 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 Apr 8 Total , 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'

20 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 Nov De 79 fog fog 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar ,5 4, I,2 14,75 1 Apr ,4 I 11 l! 1 1 Total ,5 4, ,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

21 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 , ,475 3 Nov " 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 1, , 15 1 Apr Total ,2 2, , 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.

22 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 ,6 3 Nov ,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, ,955 JO Apr Total 35 2, 1 2, 775 1, ,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.

23 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 (/) ) m ro. m Q) m.....j (/) (/) u ::: u u "' Total..,ii 15 Nov Nov De 79 fog fog 1 48 Jan Jan 8 JOO fog fog JOO 4 Feb 8 18 Feb 8 3 Mar Mar I,575 1 Apr Total 16 1 I 5 4 1, ,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

24 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 Nov O"\ 13 De fog fog Jan Jan fog fog Feb Feb Mar Mar Apr 8 Total ,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,

25 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 I De 79 1 fog 9 5 fog Jan N 21 Jan 8 fog fog 4 Feb Feb 8 3 Mar 8 25 Mar JO Apr 8 : L. Q) a Total :.::.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. \.

26 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 ro. ro (!) ro.. 1 V) V) u :: ro u u Total 15 Nov Nov De 79 fog fog 325 N 48 Jan 8 21 Jan 8 fog fog 4 Feb 8 18 Feb 8 3 Mar 8 25 Mar o Apr Ul I.. (!) "'Cl V) Total ,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.

27 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 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 fog 225 N 48 Jan Jan fog fog Feb Feb 8 3 Mar 8 25 Mar 8 1 Apr 8 U') I.. Q) "O o u, Total 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. \

28 Table 1. Waterfowl ensuses on some of the reservoirs in southern lllinois15 November 1979, 1 Apri 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 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 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. (

29 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 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 Apr 8 Total 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. \

30 Sanderson Table 2. A omparison of the waterfowl ensuses on some of the reservoirs in southern inois through Number Counted on Aerial Flights Speies Vl s... Q) "C ro.n Canada Goose 155, ,953 25,37 243,93 482, , , ,825 Ma 11 ard 73,39 151, ,264 1,74,277 1, 145, , ,99 833,395 Blak Duk 31,56 5,93 15,562 32,896 21, ,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, ,526 46,87 12,57 56,93 67,435 Lesser Saup 24,238 7,83 3,45 8,31 23,35 22,75 16, ,455 Northern Shoveler 193 1, ,877 3,386 1, ,875 Ringneked Duk 9,763 3, ,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, ,238 Redhead 95 3, , ,75 Bluewinged Teal 875 1, , 776 9,213 3,865 3,445 15,525 Amerian Greenwinged Teal , 779 5,558 3,525 8,965 9, 1 Gadwa 11 4,335 3, ,491 3,483 1,995 4,31 6,69 Ruddy Duk 1, ,25 2,87 Hooded Merganser ,85 1,53 Bald Eagle Bufflehead 43 2,5 2,9 Table 2 ontinued. \

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

32 Table 3. A omparison of the number of waterfowl ounted per flight on some of the reservoirs in southern lllinois through Number Counted per Aerial Flight Speies Canada Goose 17,31 12,55 27,819 22, 175 4,2 44,85 17, 14 63,536 Ma 11 a rd 78, ,82 6,585 97,662 95,49 49,284 69,98 92,599 Blak Duk 3, , 729 2,99 1, 763 1,75 1,16 l, 749 Common Goldeneye 1, ,288 1, 126 1, 788 3,61 3,76 4,78 Common Merganser , 11 1,492 l, 756 Pintail ,58 2, , 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, , 942 2,7 1,466 5, 162 Northern Shoveler Ringneked Duk 1, , 116 1, 559 1, ,66 Canvasbak ,21 1, Lesser Snow Goose , , 91 2,26 Redhead Bluewinged Teal , 725 Amerian Greenwinged Teal ,11 Gadwa Ruddy Duk Vl I.. Q) Hooded Merganser Bald Eagle o V) Bufflehead Table 3 ontinued.

33 Table 3. Continued page 2. Wood Duk 5 6 Small Canada Geese 316 Redbreasted Merganser Cormorant 2 3 Mute Swan Ll Common Loon 1 Mean 11,836 38,866 97, , , , , 96 26,215 In , , and extra early and 1 extra late flight were made, in 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 and and was ensused only on 4 of 11 flights in and 11 of 12 flights in ; CIPSBogota and IPClinton were not ensused until ; and in 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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