SCOPE OF INVESTIGATIONS AND METHODS USED 
Winter Survey 
During recent years the survey of waterfowl wintering grounds has 
included the major wintering areas in Alaska, Canada, United States, and 
Mexico. In January 1957, due to circumstances beyond our control, it was 
not possible to carry out the survey in Mexico. Although the Mexican survey 
was conducted in January 1958, data are not available for making a compari- 
son between 1957 and 1958 in this important. wintering area. 
In the United States, the Bureau of Sport Fisheries and Wildlife 
organized the surveys, but much of the field work was carried out by per- 
sonnel of the 48 State Conservation Agencies. In Alaska the survey was 
carried out by Bureau personnel, while in Canada the Canadian Wildlife 
Service organized the survey and the field work was conducted by personnel 
of that Agency and the Provinces. 
The wintering areas were surveyed by means of boats, cars and 
planes, with all important areas being covered from the air. Information 
as to personnel, equipment, and distances traveled, is presented in the 
following table? 
Participation in 1958 Winter Waterfowl Survey 
Aerial Coverage 

Number Observers Number Hours Miles Miles 
Location U. S. State Other Total Planes Flown Flom  -Driven 
Pacific | . : | A322 
Flyway 47 204 3 344 34 176 17,370 2 
Central 
Flyway 2 2 2 435 36 259 «22,915 44, 750 
Mississippi 
Flyway 85 195 le 892 te) 253 23,756 a1,231 
Atlantic 
Flyway 40 122 «83 185 31 27k 18,998 6,477 
TOTAL U.S. 1724 #%41,211f 38f 1,856 150 962 83,039 102,458/ 

