TABLE A-5. - -Number of birds observed, by species, Central Flyway extended, 
winter survey, 1963 and 1964 
Species 
1963 
1964 
Percent 
change 
Number 
Percent 
Number 
Percent 
Ducks: 
Dabblers: 
Mallard- 
1,659,559 
32.4 
2,195, 673 
36.0 
+ 39.5 
Black duck- 
2,948 
Trace 
158 
Trace 
- 94.6 
Mottled duck-- 
7,030 
0.1 
4,910 
Trace 
+ 79.6 
Gadwall- 
95,565 
1.8 
121,249 
2.0 
+ 26.9 
American widgeon- 
252,100 
4.9 
334,264 
5. 5 
+ 32.6 
Green-winged teal- 
223,500 
4.4 
257,836 
4.2 
+ 15.3 
Blue-winged and 
Cinnamon teal- 
60,855 
1.2 
165,988 
2.7 
+172.6 
Shoveler- 
65, 793 
1.3 
89,125 
1.5 
+ 34.0 
Pintail- 
602,685 
11.8 
784,520 
12.8 
+ 19.1 
Wood duck- 
1,251 
Trace 
744 
Trace 
— 
Tree duck- 
32,714 
0.6 
29,142 
0.5 
- 11.0 
Subtotal- 
3,004,000 
58.7 
3,981,609 
65.2 
+ 32.5 
Divers: 
Redhead-- 
395,044 
7.7 
297,938 
4.9 
+ 47.9 
Canvasback - 
21,382 
0.4 
24,700 
0.4 
+ 15.5 
Scaup- 
315,358 
6.2 
108,788 
1.8 
- 65.3 
Ring-necked duck- 
36,593 
0.7 
37,461 
0.6 
- 8.6 
Goldeneye- 
11,034 
0.2 
5,104 
0.1 
+ 54.3 
Bufflehead- 
5,833 
0.1 
3,861 
Trace 
- 24.4 
Ruddy duck- 
10,108 
0.2 
18,281 
0.3 
+ 74.0 
Subtotal- 
795,352 
15.5 
496,133 
8.1 
— 
Miscellaneous: 
Eider and scoter- 
— 
— 
3 
— 
— 
Merganser- 
82,450 
1.6 
88,168 
1.4 
+ 9.7 
Subtotal- 
82,450 
1.6 
88,171 
1.4 
Unidentified- 
139,538 
2.7 
263,408 
— 
+ 4.5 
Total ducks- 
4,021,340 
78.6 
4,829,321 
79.0 
+ 20.0 
Geese: 
Snow goose - 
405,309 
7.9 
288,497 
4.7 
- 28.9 
Blue goose- 
20 
Trace 
41,923 
0.7 
+100.0 
White-fronted goose- 
58,666 
1.1 
68,898 
1.1 
+ 17.4 
Canada goose- 
201,573 
3.9 
251,812 
4.1 
+ 26.3 
Total geese- 
665,568 
13.0 
651,130 
10.6 
- 1.8 
Swans: 
Whistling swan- 
5 
Trace 
15 
Trace 
— 
Trumpeter swan- 
258 
Trace 
38 
Trace 
— 
Total swan- 
263 
Trace 
53 
Trace 
— 
Coots- 
429,276 
8.4 
643,288 
10.4 
+ 49.8 
Grand total- 
5,116,447 
100.0 
6,105,792 
100.0 
+ 24.4 
41 
