22 
Comparative data gathered during aerial survey of the Rocky Mountain 
Trench are tabulated in Table [V. These figures represent approximate total 
counts for that portion of the Rocky Mountain Trench from the south end of 
Columbia Lake north to Moberly. A drop of about five percent in the Canada 
- goose population is indicated this year. The number of ducks recorded was also 
down about 40 percent. 
Table [V.- Aerial Survey - Rocky Mountain Trench. 


1950 1951 1952 1953 1954 1955 
Ducks Fer Sq. Mi. 19.9 10.1 12.0 19.5 26.2 15,2 
Canada Geese Per 
Sq. Mi. 20.1 17.4 1: ae 25.3 19.0 18,0 
Canada Goose 1,612 1,395 1,575 2,025 1,528 1,445 
Snow Goose - - - - 12 - 
Whistling Swan 2 10 ] l 29 64 
Mallard 773 402 445 576 309 412 
Baldpate 167 83 155 103 115 152 
Green-winged Teal 24 - 15 - 2 12 
Blue-winged Teal 83 7 - - 28 - 
Canvas back 27 3 - 10 8 - 
Scaup 18 9 53 3 143 70 
Goldeneye 79 97 65 91 69 42 
Bufflehead 2 21 9 18 75 10 
Others 49 33 88 49 47 43 
Unidentified 376 135 130 705 1,275 476 
TOTAL DUCKS 1,598 790 960 fr, 555 2,071 1,217 
Time and personnel did not permit extensive ground surveys in the 
Kamloops, Okanagan, and Columbia Valleys this year. However, it was possible 
to obtain counts on eight sloughs in the Beresford area near Kamloops. The 
results of this survey are given in Table V. No comparable figures for past 
years are available. 
