Table 3. Trends in the Breeding-population Index, 1953-61. 
The first figure listed for each State by years is the adjusted average 
doves heard calling per route. The method of adjustment is described in the 
text. The base year for adjustments was 1956 or 1957. States for which 
1957 was the base year are those that reorganized call-count routes in that 
year. These States are Alabama, Georgia, Kentucky, Mississippi, North 
Carolina, South Carolina, and Tennessee. 
‘The second figure for each State is the breeding-population index. 
The index, expressed in thousands, is the product of the adjusted average 

13 
doves heard per route and the estimated area of dove habitat. (Habitat 
area is given in table 1.) 
State 1953 1954 1955 1956 1957 1958 1959 1960 1961 
Ala. 17.4 21.3 419.7 19.9 21.1 23.8 18.7 22.7 20.1 
889 1,088 1,00 1,016 1,078 1,216 955 1,159 1,027 
Ariz. 30.7 31.8 29.4 40.0 33.1 31.0 33.6 26.3 W7 1 
3 487 33 612 35339 hs 543 3,759 3,521 35 816 2, 987 55350 
Ark. 34.6 27.1 32.0 29.4 32.6 33.7 30.0 28.0 30.5 
1,824 1,429 1,687 1,550 1,719 1,777 1,582 1,476 1,608 
Calif. 37.8 34.7 30.0 34.9 36.7 41.2 5561 59.5 hO.7 
5,334 4,897 4,234 4,925 5,179 5,814 7,776 8,397 6,026 
Colo. no 46.5 50.2 70.5 57.6 46.4 23.8 34.9 16.8 
index 3,384 3,653 5,131 4,192 3,377 1,732 2,540 1,223 
Conn. 5.0 0.0 5.6 5.5 9.0 7.0 6.0 9.6 5.2 
20 6) 22 22 35 27 eh 38 20 
Dela. 28.0 29.0 30.0 33.0 31.0 30.0 54.0 49.0 36.0 
55 57 59 65 61 59 LOT oT 71 
Fla. 18.2 15.2 16.7 14.6 13.8 11.0 11.0 12.9 12.0 
988 825 906 792 Th9 597 297 700 651 
Ga. 17.2 17.3 15.5 22.5 21.4 15.9 18.9 24.0 20.4 
1,007 1,012 907 1,317 1,252 930 1,106 1,404 1,194 
Idaho 22.8 30.0 26.3 26.8 27.0 23.8 26.7 30.8 27.2 
| 1,133 1,491 1,307 1,332 1,342 1,183 1,327 1,530 1,351 
Tl. 23.7 19.4 19.7 22.8 30.3 32.8 33,2 31.6 36.0 
1,326 1,085 1,102 1,276 1,695 1,835 1,857 1,768 2,014 
Ind. 23.5 hed 35.7 29.3 32.8 34.0 35.4 26.8 30.2 
851 1,535 1,293 1,01 1,188 1,231 1,282 970 1,093 
