
Table 1.--Trends in Doves Heard Calling on Call-count Routes, 1962 to 1963 (con. ) 


CANADAX#* 
) ; 
Est. Dove Compa- Average Heard per Route and Indexes* ; 
Habitat rable 1962 1963 Percery 
Province sq. mi. Routes Heard Index Heard Index Ch 
Ontario x* 12 15.9 x 17.0 x + 6.5 
+T 
* From a base year, average doves heard calling per route for each State has been 
adjusted annually according to the percentage change from the preceding year in 
counts on comparable routes. The index, expressed in thousands, is the product 
of the adjusted average doves heard per route and the estimated area of dove 
habitat. 
The area of dove habitat has not been estimated for Maine, New Hampshire, Rhode 
Island, Vermont, and Canadian Provinces. 
¥*x To date only Ontario has submitted comparable data for routes run in both 
1962 and 1963. 
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