TABLE A-15. —Number of birds, by species, west coast of Mexico 
winter survey, January 1964 and 1963 
Species 
1964 
1963 
Ducks: 
Dabblers: 
Mallard- 
Gadwall- 
American widgeon- 
Green-winged teal- 
Blue-winged teal- 
Shoveler- 
Pintail- 
Wood duck- 
Tree duck- 
Subtotal- 
Divers: 
Redhead - 
Canvasback- 
Scaup - 
Ring-necked duck- 
Goldeneye- 
Bufflehead- 
Ruddy duck- 
Subtotal- 
Miscellaneous: 
Scoter - 
Merganser- 
Unidentified- 
Total ducks- 
18,070 
41,155 
51,190 
76,120 
206,800 
133,325 
173,530 
84,600 
142,720 
250,205 
706,680 
426,387 
41, 550 
40, 545 
1,340,540 
1,052,337 
27,970 
27,775 
395 
700 
139,325 
150,910 
— 
1,300 
1,150 
85 
850 
95 
9,950 
32,950 
179, 640 
213,815 
2,000 
— 
1,600 
— 
51 
1,520,180 
1,269,803 
1 
Includes only areas surveyed both years. 
48 
