Table 1.--Trends in numbers of doves heard calling on routes, 1964 to 1965 (con.) 
CENTRAL MANAGEMENT UNIT - HUNTING STATES 
Percent change 
Adjusted 
average 
Est. dove 
Compa- 
in number of 
heard 
per route & indexes* 
habitat 
rable 
doves heard 
1964 
1965 
Percent 
State 
(sq. mi.) 
routes 
comp, routes 
Heard 
Index 
Heard 
Index 
change 
Ark. 
52,725 
11 
-12.23 
27.1 
1,429 
23.8 
1,255 
Colo, 
72,777 
9 
-12.07 
14.2 
1,033 
12.5 
910 
Kans. 
92,113 
21 
- 9.18 
49.0 
4,514 
44.5 
4,099 
Mo. 
69,270 
16 
-10.60 
37.8 
2,618 
33.8 
2,341 
N.M. 
109,360 
11 
- 6.40 
35.3 
3,860 
33.0 
3,609 
Okla. 
69,283 
13 
- 8.44 
41.7 
2,889 
38.2 
2,647 
Tex. 
263,644 
30 
- 5.66 
38.8 
10,229 
36.6 
9,649 
Sub- 
Total 
729,172 
111 
26,572 
24,510 
- 7.76 
CENTRAL MANAGEMENT UNIT - 
NONHUNTING STATES 
Iowa 
55,986 
16 
-16.84 
31.3 
1,752 
26.0 
1,456 
Minn. 
60,007 
13 
- 9.04 
21.1 
1,266 
19.2 
1,152 
Mont. 
124,369 
19 
+ 2.39 
64.9 
8,072 
66.5 
8,271 
Nebr. 
76,653 
19 
-15.92 
49.4 
3,787 
41.5 
3,181 
N.Dak. 
70,054 
24 
+15.61 
33.4 
2,340 
38.6 
2,704 
S.Dak. 
73,475 
13 
-10.03 
29.0 
2,131 
26.1 
1,918 
Wyo. 
82,080 
12 
+22.41 
16.6 
1,363 
20.3 
1,666 
Sub- 
Total 
542,624 
116 
* 
20,711 
20,348 
- 1.75 
Central 
Unit 
Total 1, 
,271,796 
227 
47,283 
44,858 
- 5.13 
* 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, or Canadian Provinces. Data from these States have 
been excluded in calculating weighted indexes. 
-12- 
