12 

Treeless Delta (MacKenzie River - N. W. T.) 


Ducks per square mile: 1948 - 25. 
2 
1949 - 38.1 
1950 - 43.4 
Swans per square mile: 1948 - 1.4 
1949 - 0.9 
1950 - 0.8 . 
Canada geese / sq. mile: 1948 - . 03 
1949 - .03 
1950 - Q,1 
White-fronted geese / sq. mi.: 1948 - .06 
1949 - .04 
1950 - .02 
(Increase over 1949 of 12.3% in ducks). 
Percent Composition 1950 
Pintail 83.1 Mallard 3.8 
Baldpate 5.5 Scoter 1.7 
Scaup 4.4 Shoveler 0.6 
(Remainder consisting of unidentified ducks, golden-eye, green-winged teal 
and canvasback). 
Upland Tundra (between MacKenzie and Anderson Rivers, N. W. T.) 


Ducks per square mile: 1948 - 35,4 
1949 - 32.6 
: 1950 - 32.8 
Swan per square mile: 1948 - 1.2 
1949 - 1.0 
1950 - 1,0 
Canada geese / square mile: 1948 - 0,5 
1949 - --- 
1950 - .04 
White-fronted geese/sq. mi.: 1948 - 1.9 
1949 - 0.7 
1950 - 2.5 
(Increase over 1949 of 0.6% in ducks). 
Percent Composition 1950 
Scoters 45.7 Scaup 10.6 
Old-squaw 21.0 Baldpate 1.1 
Pirtail ~ 19.0 
(Remainder consisting of unidentified ducks, mergansers, mallard, 
green-winged teal and golden-eye). 
