09 

Table VI. - Redvers Study Area -- Brood Production 
Method I Method II 
All Broods Glass I Broods Total Est. Class III Broods August Broods Total Est. 
Observed on from Brood from except Brood 
Species July Census Aupust Census Production July Census flying Production 
Mallard 76 Po 101 27 72 99 
Blue -winged ‘teal 33 30 63 2 68 70 
Pintail 20 ~ 20 13 3 16 
Baldpate 12 6 18 - 16 16 
Green-winged teal 2 4 6 - 9 9 
Canvasback : 19 - 19 3 19 22 
Shoveler 5 1 6 - 9 9 
Lesser scaup 2 6 8 - 7 7 
Gadwall - z 2 ~ 2 2 
Redhead i ] 2 - 4 2 
Ringnecked duck 1 - l “ 1 1 
Ruddy duck - ~ 0 ~ 4 _ 
Total 171 75 246 45 208 253 
Table VII. - Pair-Brood Data -- Redvers Study Area 
Breeding Pair Vensus Brood Census Production 
‘Pairs in Pairs Breeding Percent Brood Percent Percent of 
May Remaining Population Species Production Species Successful 
Species in Aug. Comp. Comp. Females 
Mallard 258 3 255 44.3 101 41.1 39.1 
Blue-winged teal 150 2 148 25.7 63 25.6 42.0 
Pintail 55 1 54 9.4 20 8.1 37.0 
Baldpate 31 4 27 4.7 18 7.3 66,7 
Green-winged teal 34 3 31 5.4 6 2.4 19,3 
Canvasback 24 2 22 3.8 19 7.7 86.4 
Shoveler 13 1 12 Bel 6 2.4 50.0 
Lesser scaup 12 0 12 ZI 8 a2 66.7 
Gadwall 6 0 6 1,1 2 0.8 3343 
Redhead 4 0 4 0.7 2 0.8 50.0 
Ringnecked duck 4 1 3 0.5 1 0.4 33.3 
Ruddy duck 1 0 1 0.2 0 0 0 
42.8 
— 
Lan) 
So 
oO 
246 
i) 
—" 
oS 
So 
575 
~J 
Total 592 1 
