FIGURES 8, 9, and 10. Graphs of all 20 stations. 
Comparison of average number of doves heard during 
five crew count and one-man count for mornings of the 
months of April (Fig. 7), June (Fig.8), and Aug. (Fig.9). 
April, 1951 
Figure 8 
——- Five Two-man Grew Count 
@ 
@ 0.5 ~--One—man Call Count 




O , a 
'2 3 4 5 6 7 8 9 10 It 12 13 14 15 16 I7 18 19 20 
Stations 
June, 195! 
— Five Two—man Crew Count 
~-One-—man Cal! Count 



05 
Number of Doves 
!2 3 4 5 6 7 g8 9 10 Jt 2 13 14 15 16 17 18 19 20 
Stations 
August 195] 
Figure id 
ae — Five Two-man Crew Count 
~= Qne-man Call Count 
Number of Doves 
Oo 
nH 

| 23 4 5 67 8 9 101 2 13 14 15 16 I? 18 19 20 
Stations 
