ABSTRACT 
An index to the 1964 mourning dove breeding population 
was obtained by a call-count survey conducted throughout the 
United States. Trends in the breeding population index were 
calculated for three management units and for hunting and 
nonhunting States within the management units. Trends in the 
breeding population indexes from 1963 to 1964 were as follows 
Eastern Unit up 7*4 percent, Central Unit up 3*6 percent, and 
Western Unit up 18.7 percent. For the United States as a 
whole, the 1964 breeding population was up 7*9 percent from 
1963. 
Summaries of call-count surveys conducted in Canada dur¬ 
ing 1963 and 1964 are included. The average number of doves 
heard on comparable routes in Ontario (the only Province sub¬ 
mitting comparable data) declined 3*9 percent from the 1963 
level. 
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