193 
Table I - Summary of Waterfowl Data Obtained in Aerial Survey -- North Dakota 

May 1952 
A 
Transect No. Sq. Mi. Sampled Total Ducks Seen Ducks Per Sq. Mile 
I 78,0 1,076 13.8 
3 79.5 912 11.5 
5 80.0 982 1z..3 
6 80.7 1,381 17.1 
7 83.0 831 10.0 
8 83.0 1,121 13.5 
3 84.0 1,813 21.6 
10 85.0 1, 300 15.3 
11 85.0 1,091; 12.8 
12 85.0 828 9.7 
13 86.0 879 10.2 
14 86.0 — 789 9.2 
15 87.7 1, 384 15.8 
16 89.0 964 10.8 
17 90.0 1,957 21.7 
18 89.0 1, 086 12.2 
Total 1510.4 20, 241 
Average 13.4 

Table III - Species Composition and Sex Ratio of Identified Ducks Recorded During 
Ground Survey in North Dakota - May 1952 
Species Composition 
Species Male Female Total Percent Males Percent Total 
ty Scala 7 YA UE RI 8 SL Sa eo GN AC TE PS LO 
Blue-winged teal 1,017 771 1, 788 32.0 36.5 
Pintail 900 255 1,155 28.3 23.6 
Mallard 483 174 657 F5.. 2 13.4 
Shoveler 222 150 372 7,0 7.6 
Gadwall 179 157 336 5.6 6.9 
Redhead 74 42 116 2.3 2.4 
Baldpate 65 50 115 4.0 2.3 
Canvasback 89 30 119 2.8 2.4 
Scaup 84 46 130 2.6 2.7 
Ruddy duck 43 33 76 1.4 1.5 
Green-winged teal 19 10 29 .6 .6 
Ring-necked duck 6 5 11 T. Ts 
Bufflehead l 0 ] Te T 

Total 3,182 Lb t33 4,905 


