120 
Table 1. -- Species Composition - Aerial Transects 

Percent __ Species 
Species No. Seen Abundance | Per Sq. Mi.. 
Mallard 102 : 40.6- 4.2 
Pintail 64 25,5 oo 2.64 
Cinnamon teal 64 25:55 2.64: 
Gadwall 13 5.2 fi 54 
Redhead 2 8 ~- 
Green-winged teal 2 .8 as 
Merganser 4 1.6 -- 
Unidentified 239 
Total 490 
There are approximately 550 square miles of irrigated land, (meadow, cultivated 
crops and pasture) in geographical Unit 11. Forty-seven square miles were flown, 
resulting in an 8.62 percent coverage of the total habitat, and a ratio of 10.4 ducks per 
a! Bry 
Square mile. 
Records obtained of the breeding population on the reservoirs were more complete 
as to species, pairs, and single males and females, than was possible for the aerial’ 
transects. The lateness of the count was again evident in that few pairs of the early nest- 
ing species were seen when compared with their production. 
Table 2. -- Breeding Population - Reservoirs 
Single Single Pairs Female Male Percent 
Species Pairs Female Male Sq. Mi. Sq. Mi. Sq. Mi. Total Total 
Mallard 8 40 64 1.76 8.8 14,1 120 9.56 
Pintail 8 44 91 1,76 5.7 20.1 151 12.0 
Gadwall 94 13 34 20.6 2.86 7.5 235 18.7 
Cinnamon teal 24 6 _ 60 5.3 1.32 13.2 114 9.1 
G-w. teal 5 2 67 1.1 44 14.7 79 6.3 
Baldpate 4 1 6 . 88 22 1,32 15 1.19 
B-w. teal 4 - 1 . 88 - 4 9 ~72 
Shoveler 2 - 15 44 - 3.3 19 1, 52 
Redhead 58 6 17 12.8 1.32 3.74 139 11.1 
Lesser scaup 13 1 39 2.86 22 8.6 66 5,26. 
Ruddy 23 10 21 4.4 Bare 4.63 77 6.14 
Coot - - - - - - 230 18.3 
Totals 243 123 415 53.6 27.2 91.5 1,254 
The aggregate of the ten reservoirs, ranging in size from one to 1,520 acres, 
was 4.54 square miles which gave a count of 53.6 pairs per square mile. As stated 
before, although selected at random, the reservoirs represent some of the largest and 
probably best for waterfowl in this unit. The ratio of reservoirs covered to reservoirs 
available in this unit is not known as new ones are being built every year by individuals 
for stock watering and irrigation. 
Marsh Survey 
Of the total habitat available in Unit 1V only the marsh and lakes of Stillwater 
Wildlife Management Area were investigated. On the basis of total marsh and lake 
area, 21.18 square miles, the Stillwater marsh and the Indian Lakes had a breeding 
population of 64.5 pairs per square mile. 
