

60 

Figure 1, -- Nesting Chronology of Mallard, Pintail, and Blue-winged Teal for the 
years 1949 and 1950, Determined by the Percentage of Nests Started 
by Weeks of the Season. | 
30% Mallard 
1949 y x 39 nests 
1950 @-----e 24 nests 

-3 6-10 6-17 6-24 7-1 
-9 6-16 6-23 6.30 7-7 
Pintail 
20% °, P 1949x——% 60 nests 
‘ ve ,? Sx 
x 
° 50 nests 
oO on 

10% 

é | 
\ Blue-winged teal 
20% 
x 1949 * * 654 nests 
. 1950 @----~*® 61 nests 

10% 

4-22 4-29 5-6 5-13 5-20 5-27 6 
5212519 5-26 6-2 6 
