168 
Temperatures were far below normal, which delayed nesting of some species 
and reduced the hatching success of early nests of Canada geese and mallard. 
Aerial Census 
The aerial survey of 1955 covered the same routes and distance as 
the 1954 survey. Water conditions were good along all aerial routes. The 
following table gives a comparative summary of the results of the 1954 and 1955 
surveys: 
Table I. - Total Ducks Counted by Area and Square Mile as Determined from 
Aerial Surveys - 1954 and 1955, 



Sq. Mi. Sampled Total Ducks Counted Ducks/Sq. Mi. 
Route 1954 1955 1954 1955 1954 . 1955 
Box Elder Co. 48.0 48.0 2,752 3,958 57.3 82.5 
Weber Co, 15.5 15.5 1, 100 1, 390 70.9 89.6 
Davis Co. 14,2 14. 2 330 409 23.2 28.1 
Jordan River Clubs 6.2 6.2 809 584 130.5 94.2 
Salt Lake Co, 6.7 6,7 36 91 5.4 13.6 
Utah Co. 18.0 18.0 211 380 11.7 21.2 
Total 108.6 108.6 5, 238 6, 812 48.2 62.7 
There was a 30 percent increase in the population of ducks along the 
aerial transect routes. All areas increased except the Jordan River Clubs. 
Counts of the species of ducks along the transect routes indicated a 
large increase in the redhead population of the area. There was also an increase 
in the numbers of mallard counted. There was a decline in the count of Cinnamon 
Teal. 
Ground Census 
Ground counts on State waterfowl refuges indicated a slight decrease 
in the breeding population of these areas. There was a marked decline in Canada 
geese and cinnamon teal. The population of redheads increased on all areas, 
Construction activity forced the draining of some sections of the public shooting 
grounds and may have accounted for some reduction in the population of this area. 
