_ 
“ CENTRAL FLYWAY 
CONCLUSIONS - 
With the breeding population 21 percent below that of 1953, 
water conditions lower than they have been at any time during the 
1950-53 period, and the number of broods observed during July 
being the same as or somewhat below the 1953 level, it is 
estimated that there will be fewer ducks move southward from 
South Dakota this fall. 
WYOMING 
Weather and Water Conditions - 
Water conditions throughout central and eastern Wyoming at the 
commencement of the breeding season were sub-normal and run-off 
was below average. Up to the present little improvement has been 
no¢ed. In recent weeks the mountainous northwestern section and 
portions of the stockpond area in northeastern Wyoming have received 
ample precipitation to maintain water levels. The remainder of the 
State, however, is experiencing drought conditions. Should this trend 
continue through the next few weeks, it may have a significant depressing 
effect upon waterfowl production. 
An. early warm spell this spring was followed by a period of 
unseasonably cold weather. Asa result, nesting was delayed for 
both ducks and geese. First broods were observed later than usual, 
and the brood period will probably be prolonged over a relatively 
longer time. 
Breeding Population Indices - 
This year, Wyoming revised its State-wide breeding ground 
survey methods. Although the surveys this year yield more reliable 
data, there is little opportunity for making comparisons with previous 
years. For the record, however, the following are the data collected: 
43 
