CENTRAL FLYWAY 
WYOMING 
Weather and Water Conditions - 
Wyoming experienced a late spring this year, delaying the breeding 
season to some extent throughout the State, and as much as three to four weeks 
in some areas. The prolonged cold weather may have had an adverse effect 
upon early nesting birds. 
Water conditions have remained sub-normal in the western two-thirds 
of the State. Despite early spring snows and late rains, the water content in the 
snow pack was below average, run-off was reduced and water levels in reservoirs 
and stock ponds sub-normal. 
The eastern third of Wyoming, with few local exceptions, had an 
abundance of water areas this spring as a result of timely snow falls. Later 
rains have maintained a majority of the water areas in good condition. This 
portion of the State has received more moisture during the first six months of 
the year than has been recorded since the commencement of the current drouth, 
and Sheridan, Johnson and Goshen Counties have had near record snow and 
rainfall during the spring and early summer. 
Breeding Population Indices - 
Table 1 presents a summary of the duck breeding ground survey 
prepared by the Statistics Department of the University of Wyoming. Figures 
piven represent corrected totals. 
No comparison of results can be made with previous years' surveys, 
but use of essentially the same sample areas in the future should provide a basis 
for comparison. General impressions, however, indicate that there were a 
great many more breeding ducks in the stock pond area in the eastern third of 
Wyoming than in 1954, whereas it is believed the remainder of the State held 
fewer birds. 
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