TABLE F-21.--Waterfowl production indexes, North Dakota, South Dakota, and Western Minnesota, 1958-61 

TABLE F-22.--Pertentage species composition of duck broods seen during mid-July surveys, North Dakota, 
1960 and 1961 

Dabblers: 
Pintal ]---------00esen~n2e een n n= - 29.8 
Mal lard----02<00sc22ceee- + - nnn e == 16.8 
American wldgeon--<<=-<<<2+--<-2==-- 2.4 
Shove lere---<2s2csccenesen none = == 11.5 
Gadwal ]------ 20-200 enn 22 seen nn n= 9.6 
Blue-winged teal=--<----------------- 28.9 
Subtotal --------22------2----22------ 99.0 
Divers: ¥ 
SCAN Po 222-202 e enn nnn ene ene esene=== a 
Canvasback---2=20.<-----+----------- 5 
Redhead Se ee tee ee eee ee ae eee ee = 
Ruddy duck-<---0<-<-0~------------0= “5 
Bite nnennenecennenen x 
Total s----ccnnnnecnn erence neneesnn== 100.0 
TABLE F-23.--Age class composition of duck broods seen during mid-July surveys, North Dakota, 1960 and 1961 
Percent of total 
Age class 
1955-60 average 1960 196] 
t 
75.93 51.9 
18.4 41.4 
567 6.7 

117 
