
Percent of all 
successful nests 
started 
100 


Apr. 10 Apr. 30 May 20 JuneQ9 Jue 29 July 19 Aug. 8 
Date started 
Percent of all 
successful nests 
started 
100 

Apr. 10 Apr. 30 May 20 June 9 June 29 July 19 - Aug. 8. 
Date started 
1950 1951 1952 1953 

Figure 12.--BLUE-WINGED TEAL AND GADWALL: FIRST EGG LAYING IN 
| SUCCESSFUL NESTS, 1950-53 
28 
