134 
Summary. of Data 
Although the spring and summer were excessively dry, temperatures were 
normal. Waterfowl production was not seriously hampered and shows a 
favorable increase of 4.26 percent over 1951, 
The average brood size of Class III mallards, which are the most important 
breeders in the State was 6.2. This compares very favorably with brood 
sizes observed during the past five years. 
Of the ten major species of ducks breeding in eastern Washington, mallards, 
pintails, baldpates, gadwalls, scaup and ruddy ducks increased considerably 
in abundance. . 
Blue-winged, cinnamon and green-winged teal, shovelers and redheads show 
a decrease in production. 
The 1952 production index of Canada geese on the Lower Snake and Columbia 
River systems of southcentral Washington will be about 4,450 young compared 
to 3, 300 in 1951, or an increased production of 25 percent. 
