Species 
Mallara 
Pintail 
Teal 
Shoveller 
Gadwall 
Baldpate 
Redhead 
Coot 
A. Merganser 
- Byady 
Secaup 
Unkown ° 
Pairs 
1957 1958 
ho, 42eh 32,946 
9,435 11,020 
8,020 1,347 
4,721 3,298 
2,2h0 3,077 
6,243 3,781 
236 268 
4,127 1,569 
1,772 1,890 
0 107 
354 21h 
236s 1,514 
77,808 67,032 
TABLE I 
SUMMARY OF DUCK BREEDING GROUND SURVEY 
WYOMING 1957 - 1958 
Estimated Population 
% Change % Change From Total : 
From 1957 4-year Average 1957 1958 
- 18.5 7 a 85,405 77,081 
f 16.8 £439 18,874 31; 335 
- 8.4 f10.4 9, 807 15,117 
~ 30.1 Boe” 5,274 7,395 
/ 37-4 /18.8 3, 436 6,157 
- 39.4 f10.7 7,479 7,894 
/ 13.6 47.3 2h7 533 
~ 62.0 ~ 7-0 4293 3,405 
f 7.0 £58.7 2,701 4,919 
f107 .0 f 4.0 6) 860 
- 39-5 -35.2 373 430 
541.5 45.1 1,414 16,853 
- 13.9 # 6.9 139,303 171,979 
% Change 
From 1957 
f 
J 
f 
1,090.0 
yi 
9.8 
66.0 
54.2 
40.2 
15.2 
23.2 
% Change From 
4-year Average 
#1.2 
#64. 
417.0 
- 1.3 
f 9.9 
#28.0 
45.6 
-20.2 
780.8 
~21.1 
-33-7 
-14.8 iz 
¢ 9.3 
