Figure 14. 



LESSER SCAUP AND GREEN-WINGED TEAL DAYS OF USE ON POOL 26 



ILLINOIS RIVER 



LESSER SCAUP 



1958' 60 I 62 I 64 I 66 ' 68 I 70 ' 72 I 74 ! 76 ! 

 59 61 63 65 67 69 71 73 75 77 



YEARS 



158 



