Os 
eee 
4 
Hy 
A 
an 
poi 

Change in mean doves heard calling 
per route between 1970 and 1971 
— Decrease (>10%) 
- No change (<10%) 
Increase (>10%) 

Figure 5.--Changes in densities of breeding mourning doves by State between 1970 and 1971 
