238 
THE WILSON BULLETIN— December, 1922 
FURTHER ROADSIDE CENSUSES IN OKLAHOMA 
On May 20, 1921, and on seven days between May 29 and July 9, 1922, 
we have taken nearly 400 additional miles of “ Roadside Censuses ” in 
Oklahoma; since this makes us over 1000 miles of such counts in this 
state during the breeding seasons of the last three years it seemed well 
to cOxxipare these new censuses with those taken in 1920 * and to sum- 
marize the results. One hundred miles of these censuses were taken 
in the Panhandle — ^Texas and Cimarron Counties — on May 29, 1922, while 
the rest were taken in central Oklahoma extending southwest to Co- 
manche County and north to Kingfisher County. All the region traversed 
was prairie and farm land. 
The accompanying table gives the average number of native birds 
seen per mile in 1920, in 1921-22, and in all three years under differing 
conditions of weather and time of day. Our later results are much the 
same as the first; there are slightly more birds under each category ex- 
cept among those seen at noon. Thus we find after 1166 miles of Road- 
side Census during the breeding season in Oklahoma an average of five 
birds per mile during all weathers and at all times of day; of 6.4 in 
the cool of the day, and 3.8 in the heat of the day. 
Numbers of Native Birds Seen on Roadside Censuses in Oklahoma 
1920 
1921-22 
Total 
Av. No. 
Av. No. 
Av. No. 
of Birds 
of Birds 
of Birds 
Miles 
Seen per 
Miles 
Seen per 
Miles 
Seen per 
Weather 
Time 
Mile 
Mile 
Mile 
Pleasant 
All Times 
780 
4.8 
386 
5.3 
1166 
5.0 
Pleasant 
All Times 
696 
5.2 
336 
5.9 
1032 
5.3 
Rainy 
All Times 
84 
1.4 
50 
2.8 
134 
2.5 
Pleasant Early Morning 
or Late Afternoon 
395 
6.2 
241 
6.8 
636 
6.4 
Pleasant 
at or 
Near Noon 
301 
3.9 
95 
2.9 
396 
3.8 
As to the kinds of birds, the most widely distributed and most abun- 
dant in the total counts are in general the same as in 1920; yet the far 
western trips show an infiuence in the greater importance of Lark Spar- 
rows and especially of Horned Larks. Of the nine most widely distrib- 
uted birds in the first censuses and the total censuses eight are the same; 
Hcrned Larks take the place of Red-headed Woodpeckers when all the 
results are considered. The birds that were seen on half or more of the 
65 censuses follow — the figures showing the number of censuses in 
which each kind was recorded: Mourning Dove, 58; Mockingbird, 54; 
Dickcissel, 49; Lark Sparrow, 46; Eastern Kingbird, 43; Bobwhite, 37; 
Bluebird, 36; Meadowlark (Eastern and Western), 35; and Horned 
Lark, 32. 
In regard to total abundance, the nine commonest birds of the first 
780 miles are still the most abundant after 1166 miles, although there is 
some shifting of relative abundance. The total numbers counted were 
as follows: Dickcissel, 999; Mourning Doves, 614; Horned Larks, 542; 
* Wilson Bulletin, XXXIII, 3, 1921, pp. 113-123, 4, pp. 194-195. 
