“ee 
TABLE C-15.--Number of birds, by species, west coast of Mexico, 
Species 
Ducks: 
Dabblers: 
American widgeon--- 
Green-winged teal-- 
Blue-winged teal--- 
Shoveler----=-----<-= 
Divers: 
Redhead-----=----== 
Canvas back-=«---<--= 
Ring-necked duck--- 
Goldeneye------=---- 
Bufflehead--------- 
Subtotal enna 
Miscellaneous: 
Merganser=-~-<--=-- 
Unidentified--------- 
Total ducks*------- 
winter survey, January 1963 





















Percent 
change 
from 
1962 
7-year 
average 
1963 














ad 546 
#15195 ba, bak 
76,120 50,901 
84,600 47,773 
250,205 208,377 
26 , 387 875,480 541,999 



40 545 25,390 27,870 
1,052,337 1,440,970 1,108,260 
27,715 10,585 21,656 
700 75 4h 
150,910 106,160 125,664 
1,300 -- 186 
85 110 237 
95 160 20h 
32,950 6,720 26,752 
215,815 


1,600 
51 
1,269,803 1,568,920 1,284,968 
Includes only areas surveyed both years. 
- Disproportionate yearly totals will not check exactly. 
91 
Percent 
change 
from 7-year 
average 

+28 
+h 
BS 
~6h, 
=58 
+107 
-42 
+2 
