
CENTRAL FLYWAY 
Late Nesting Index by Species - Continued 



Percent 
| West Central East State Comp, 
Blue-winged Teal 2,086 11,255 1,176 14,517 31.0 
. Green-winged Teal ~ - & a “é 
Scaup - 1,378 - 1,378 3.0 
Canvasback - 7 a 2 x 
Redhead 1,043 é . 1,043 2.2 
Ringneck ~ 689 is 689 1.5 
Ruddy Duck = o : A ~. 

Total | 4,215 39,277 2,352 46, 844 

Observed in Sample Index Ave, 
Class | a No. ‘Broods — No. Ducklings No, Broods No. ‘Ducklings Size 

‘I 52 265 15,138 _ 82,673 5.1 
III 45 236 12,157 77,433 5,2 


It is noteworthy that the late nesting index exceeds the brood 
index which probably indicates a late hatch of considerable magnitude still 
to be brought off in North Dakota. 
Noteworthy also is the species composition of the late nest- 
ing ducks. The mallard accounts for about half of the single drakes and 
pairs observed followed by blue-winged teal. 
Conclusions 
On the basis of a decrease in the breeding population of ducks, 
and the generally dry conditions which prevealed, it is €stimated that the 
1957 fall flight from North Dakota will be smaller than it was in 1956. 
55 
