Te 
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1953 through 1960-Fall Seasons 
Table 1) - > fosonsanevs DUCK DAY USE BY SPECIES.....MARK TWAIN REFUGE 


Note: 
Note the big drop in use starting with the 1957 season. 
started holding ducks. Apparently many ducks come to M 
1953 data for Batchtown and Calhoun Units; 
1958-1960 data included Louisa, Keithsburg, Gardner, 
populations which are now using the Missouri reservoirs. 
Upper Mississippi Refuge, 6 portion of Mark Twai 
south of the Upper Mississippi Refuge. 
averse 1953 1954 1955 1956 1957 1958 1959 1960  ‘8-yr Average’ 
Mallard : 32 , 44h , 300 : 25 ,866 , 330 28 ,277 ,900 29 , 764 , 700 18 ,662 ,17 : 
5 277; : 29,764, : 18,662,175 : 17,241,161 : 16,677,815 : : : 
mde {ee pirseg sc : 84,595 : 381,500 : 226,975 : 132,741 : 139/008 : maple, : ae as 
mar SCE ee 5 »500 : 82 ,950 : 127,750 : 147,700 : 62,755 : 49,616 : 56,035 ; 71,000 : 
Belepes oo onan 368,550 5. 16b3,080:2 532,815 : 309,800 : 610,050: WH ,875 602,392 : 399,500 : 
_ Pin ,096,000 : 1,087,800 : 5250 : 5250 : 582,575 : «332,352: 214,689 : 2 :' "300 : 
Se 2 ge 2a: Set Se: Se: eat ae) el ee 
W. »200 : 1050 : »400 : 7055: 102,725: 322,483: 176,036: 126,462: 360,300 : 
Shoveller 28 ,000 R 54 250 ;: ho 600 : 77,000 : 7h 900 : 2 13 ? : ) ‘ 360,300 : 
Z ) , : , : , : 2137 : 12, : ‘23, : : 
Wood duck 116,900 : 99,225 : 154,000 + 215,180 : 111,825 : set cals : preg : ae a : meee 
Redhead 21,000": 35,000 : 335,000: 113,400 : 51,100 : 46 305 : 16,450 : 8,806 : ho, 880 : 
Ringneck 46,200 : 306,600 ~~123,900 : 186,900 : 205,100 : 78,400 : T,1ho : 121,751 ; 13,500 : 
Canvasback 12,600 : “TT 455 227,150 : 308 ,000 ; 138 ,600 : 72,100 : 16,548 ;: 18 ,809 : 108,900 
Scaup 230,300 : 343,700 : 506,975 : 390,600 : 263,900 : 526,428 : 362,390 : 392 462 : 674,000 : 
Goldeneye 10,500 : 15,400 ; 20,650 : 14,000 : 36,400 : 20,755 : 23,2ho ; 21,623 : 20,300 :; 
Bufflehead 350 : 1,400 : 3,150 : 6,300 : ee 10,640 : 721 : "266 : 2,850 : 
Ruddy 6,650 ; 32,200 : 26,950 : 51,100 : 26 ,250 : 48,720 : hS ,920 : 33,901 : 33,950 : 
Mergansers 21,000 : 30,800 : 45,500 : 34,300 : 98,700 : 303 Ok : 36,680 : 36,064 : 75,750 : 
TOTAL : 38,720,535 : 29,339,310 : 31,116,220 : 33,830,460 : 21,167,125 : 20,036,898 : 18,651,901 : 14,080 ,843 : 26,164,680 : 
1954-1957 data includes Louisa, Keithsburg, Batchtown end Calhoun Units; while 
Batchtown and Calhoun Units. 
That was the year in which impoundments on the Missouri River 
ark Twain from a northwesterly direction, possibly from those 
While ducks move south ‘along the Mississippi River from the 
n birds are known to enter the valley from the northwest, arriving 
