While the altituds and airspeod was variad according to conditions it ; obably 
avaragsd 100 fast and 7O mph. 
Watorfowl observed wers countsd and racordad by specias when practical 
te do so. When observations "cams teo fast" or toa lergs a number of waterfowl 
were pressnt beth to count and identify them without undue mansuvsring and loss 
of tims, they wera recordsd as "unidentified." This was dons ta incraass 
sfficigney and moat of ths waterfowl rscordsd as unidsntified wers rescordsd as 
such for that reason. A sufficient number of observatious by apacies was 
obtainad for comparative purposss. : 
Comparison and Analysis of Data 
Waterfowl 
Routes 1 through 5 ars a feirly good semple of waterfowl habitat in 
ceitral North Dakota. A portion of routs 6 rung through ths Coteau area near 
tha Lostwood refuge which is an sxcsllent waterfowl production arse. Routas 
7, @, aud 9 lis in soma of the best waterfowl habitat itn South Dakota and 
Nebraska. Tranasct 10 for ths moat part liss in ths arsa wast of the Missouri 
River in South Dekota in what was previously thought to bs "worthless" country 
from 4 waterfowl atendpoint. The data obtainai on transect 10 will bs treated 
Bsparately inasmuch as this was thse first year ths’ trensect was run. 
Roytes 1 through 9 total a distance of 1,078.5 linsar miles involving a 
coverage of 269.4 square miles, Routs 10 tetals 405 Linsar miles and resulted 
in 4 goverags of 101.2 square miles. 
Tabls 1 preesnts a summary of all ducks seen on a per square mile basis, 
Table 1, --Brasding Population Tndex 
(Tucks per square mils} 
Ducks per sq. mils 
Routa No, No. Sq. Miles 1944 1947 1948 1949 
1 32.2 14.3 9.5 23.5 32,8 
2 14.7 li.4 8.9 22,1 36.6 
3 43.7 17.2 18.6 27.6 36.2 
b 29.7 11.9 10,3 32.5 aaa 
5 21.5 23.5 16.2 22.6 43.5 
Sub-total 140.8 
Ararage ducka per aq. mils 15.4 13,1 24.2 37.2 
6 29.4 31.2 25,1 
7 21.2 20,2 31.9 
8 el. 19.4 46.6 
9 46.5 20.6 29.3 
. Total 269.4" 
Average no. ducks per sq. mile Lida ty cbres 
* 1,078.5 linsar miles 
157 
