44 

3. Species composition of the areas vary as their vegetative types differ. 
In order of importance, the four most important species in each study area and the 
percent of composition of the total population which each represents are: Area I, 
pintail (41.7), mallard (20.6), Shoveler (20.1), and blue-winged teal (9.0); Area II, 
pintail (41. 7), mallard (17.6), shoveler (12.8) and blue-winged teal (9.4); Area III, 
mallard (30.9), blue-winged teal (23.9), scaup (14.9) and baldpate (6.1); Area IV, 
mallard (35.9), blue-winged teal (21.9), baldpate (10.6) and green-winged teal and 
scaup (6.4 each). 
4, Data indicates a nest success of 62.5 percent on Area II, 31 percent on 
Area III and 27.9 percent on Area IV. 
5. Brood success was relatively low on-all areas. Drought conditions 
reduced that on Area [ to almost nothing. Observed success on Area II was 35 
percent, on Area III 25 percent and on Area IV 23 percent. 
6. Aerial observations on four study areas representing bald prairie, 
mixed prairie, open and heavy parkland indicated thai 50 percent of the breeding 
population and 50 percent of the broods were seen by the aerial crew on the bald 
prairie in May and June, 60 percent of the population and 100 percent'of the broods 
on the mixed prairie in May and July, 56 percent of the population and 53 percent 
of the broods in the open parklands and 49 percent of the population and 32 percent 
of the broods in the heavy parklands. 
