
135 
Table II. - Duck Brood Size by Age Class, Entire State, 1955. 

Class | Class II Class III 
Number Average Number Average “Number Average 
Species Broods Size Broods Size Broods Size 
Mallard 109 5.8 123 5.6 65 6.2 
Pintail 13 6.8 6 6.0 4 7.0 
Gadwall 12 4.3 7 4.0 7 6.9 
Baldpate 51 4.5 32 5.8 3 Bd 
Green-winged Teal 1 7.0 13 5.2 1 10.90 
B-w. & Cinn. Teal 33 6.3 14- 4.6 1 6.0 
Shoveler 2 8.0 2 6.0 3 Bye 
Wood Duck 16 5.2 5 4.8 - ~ 
Redhead 10 6.4 1 3.0 5.2 
Ring-necked Duck 2 4.0 - - - - 
Scaup 6 6.3 2 8.0 5 ~ 
B. Goldeneye 8 5.5 8 6.0 - - 
Ruddy Duck 10 5.2 2 2.90 - - 
Hooded Merganser ~ - 1 2.9 2 1.0 
Am. Merganser 7.0 } 6.0 - 
Unidentified 27 5.7 25 4.9 6.8 
All Broods, 1955 305 5.6 242 5.4 98 6.0 
All Broods, 1954 308 6.2 210 5.4 69 5.8 
The waterfowl population index for central and eastern Washington 
showed a three percent decrease from 1954. As indicated in Table 111, most of 
the loss occurred in eastern Washington, while the late, but improved, brood 
success in central Washington resulted in a very negligible decrease in irrigation 
land production. Total production includes about 11,000 Canada geese and 35,000 
coot, 
In western Washington 28 percent fewer broods were recorded for 
the brood trend plots. Total young, plus adults, seen on the plots were down 34 
percent for mallards, 24 percent for wood ducks, and up 29 percent for blue-winged 
and cinnamon teal. Coots also were up 18 percent. 
Table III. - Waterfowl Production Index* - Washington. 


Region : 1951 1952 1953 1954 1955 
Eastern Washington 588,000 617,400 287, 000 285,000 275,000 
Central Washington 63,100 66,900 77, 500 92, 500 91,500 
Western Washington 35,000 31, 000 38, 000 35, 000 25, 300 
Total 686,100 715, 300 402, 500 412,500 392, 200 
* This index is young, plus adults Pat end of brood season. 
