TABLE B-40. - -Waterfowl breeding pairs, 
Wyoming, 1963 and 1964 
Species 
Number of ( 
adult pairs 
Percent 
change 
from 
1963 
Percent 
change 
from 
1955-63 
average 
Total duck 
index 
Percent 
change 
from 
1963 
Percent 
change 
from 
1955-63 
average 
1963 
1964 
1963 
1964 
Ducks: 
Dabblers: 
Mallard- 
71,024 
53,575 
-25 
-1 
149,517 
111,063 
-26 
-5.7 
Gadwall- 
5,025 
10,585 
+111 
+149 
10,049 
21,623 
+115 
+148 
American widgeon - - 
4,669 
5,267 
+13 
+34.9 
11,815 
10,534 
-11 
+15.1 
Teal- 
7,740 
10,384 
+34 
+44.1 
19,012 
27,540 
+45 
+64.1 
Shoveler- 
2,580 
7,409 
+187 
+167 
6,518 
22,423 
+244 
+241 
Pintail- 
20,506 
17,758 
-13 
+21.5 
42,506 
37,924 
-11 
+20.1 
Divers: 
Redhead - 
407 
— 
— 
407 
— 
— 
Canvasback - 
407 
605 
+51 
+107 
407 
1,210 
+197 
+242 
Scaup - 
— 
— 
— 
— 
— 
— 
Goldeneye - 
407 
605 
+51 
-34.2 
407 
1,210 
+197 
+287 
Ruddy duck- 
— 
— 
— 
— 
— 
Miscellaneous: 
Merganser- 
3,531 
605 
-83 
-76.3 
8,556 
1,210 
-86 
-80.4 
Unidentified - - 
6,383 
8,770 
+37 
+91.3 
46,851 
65,464 
+40 
+93.4 
Coots- 
815 
752 
-8 
-52.8 
1,630 
1,504 
-8 
-48.9 
Total- 
123,493 
116,315 
-6 
+20. 5 
297,675 
301,705 
+1 
+28.8 
TABLE B-41. —Canada goose breeding pairs, by area, Wyoming, 1963 and 1964 
Area 
1963 
1964 
Percent 
change 
from 1963 
Percent 
change from 
9-year 
average 
Snake River- 
441 
379 
-14 
+5 
Bear River- 
757 
747 
-1 
+95 
Green River- 
478 
432 
-10 
+60 
North Platte River- 
312 
348 
+12 
+44 
Wind River- 
182 
199 
+9 
+60 
Big Horn River- 
25 
40 1 
+60 
+60 
Total- 
2,195 
2,145 
-2 
+53 
1 Estimated 
76 
