TABLE F-5.-~-Long-term trend in waterfowl brood and late-nesting 
indexes by species, southern Alberta, July, 1956-63 
[ Index number in thousands ] 









Species 
Broods: 
Duck brood index--------------- 
Average brood size 
Coot brood index-------~-------- 
Late-nesting index?: 
Dabblers: 
HE ON 
American widgeon------------- 
Green-winged teal----------+-- 
Blue-winged teal------------- 
Shoveler-~---+--------~--------- 
Pintail---------------------- 
PrN) 

Subtotal------------------- 
Divers: 
ee 
OO ee eee 
I Class II and III broods only. 
2 As indicated by adult pairs and singles. 
TABLE F-6,--Waterfowl fall production index, Washington, 1962-63 
[ Includes young ] 
Percent 
change 
from -- 










Region or habitat Amount 



Scabland and plateau potholes--- 















2,578 (sq. mi.) 270,000 273,000 +1 
Northeast highlands~------------ 8,520 (sq. mi.) 9h. , 000 83,000 -12 
Central irrigation------------.- 4,078 (sq. mi.) 78,200 | 123,000 +58 
Lakes -----------~----~--------~--- 232 -- -- -- 
Streams ------~----------~------- 996 (mi.) 10, 300 -- -- 
Western Washington-------------- -- 61,900 67, 000 +8 

Total-----scesners—aeecncsause 515,000 | 556,000 
138 
