Table II. AERIAL SURVEY ~ COLUMBIA VALLEY 
1950 1951 1952 1953 , 1954 
Ducks per square mile 19.9 ~ 10.1 12.0 19.5 26,2 
Canada Geese per sq. mile 20.1 17.4 19.7 25.3 19.0 
Canada Geese ; 1,612 1,395 1,575 2,025 1,528 
Snow Geese - - - - 12° 
Swan 2 10 i 1 eg 
Mallard 773 402 WS 576 309 
Baldpate 167 63 155 103 115° 
G. W. Teal a4 - 15 - 2 
B. W. Teal 83 7 - - 28 
Canvasback 27 3 - 10 8 
Scaup 18 g 53 3 143 
Goldeneye 719 97 65 91 69 
Bufflehead 2 21 9 18 75 
Others | Ke) 33 88 ho 7 
Unidentified 376 135 130 705 1,276 
TOTAL DUCKS 1,598 790 960 1,555 2,101 
The survey was begun a week earlier than in 1953, and this, 
coupled with the fact that the season was about three weeks late tend to 
reduce the comparability of the data. It is the opinion of the biologists 
making the survey that many of the observations represented birds which 
under normal weather conditions would have been in higher country. For 
this reason, it is estimated that breeding populations in the Cariboo and 
Chilcotin areas decreased appreciably over last year, and that there may 
have been no increase in the Columbia Valley. 
Production Indices - 
Comparable data are available only from brood surveys conducted - 
between July 13 and 16 in the Cariboo region. These surveys indicate also 
that the season was about three weeks later than usual. The number of 
adults seen increased as compared to 1953, while the number of young 
decreased. Flocks of drake scaup accounted for much of the increase in 
adults, while the lateness of the season is believed to explain the 
decrease in young. Following are the data collected from the Cariboo. 
region: | 
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