Table 1, ==Summary of Veterfowl Oata Obtained in 1948 and 1949 
Aerial Surveys of derth Dakota 
Strip Square Totel ducks Inocks per 
HO. Miles Seen -quare Hile 
2 

it bs LF 1] 
A a Lfel 
o 13.6 Lie 
3 = 2959 
A 12.6 a 
- 2546 
rv 3098 ™ 19.3 
5 5119 nae 31% 
7 endl = 15,0 
: Bb. os 4 
a - 168.3 2269 seo 13.4 20045 
10 169.0 PURGE a 16.5 


il L771. 2OL7 11.8 
12 171.0 1386 LoGe Bel Gan 
L3 ees pear L595 Fal Goat 



1699 Fa 
17505 Toe 1433 cee 
Go3 
7a 
16 178.2 14.56 1346 Bed 7a 
17 180.0 1783 1915 929 1046 
Total Loge? (1948) 9,411 sg 
27B4e 7% (1949) 43,026 1507 
lf Panes through ‘/4 not included in 1949 survey. 
ey Ranges 51 through 56 not ineluded in 1949 survey. 
/ Tances 51 through 58 not included in 1949 survey. 



The Ground Survey 
srinarily for the purpose of determining species composition and observed sax 
ratics of resident spring waterfowl, ground counts of all waterfowl seen within 
one-eighth mile on either side of the read along selected routes, were made by 
means of automebile, These counts were made by North Dakota District Game Nardens 
and by vederal Aid personnel and may be located by reference Lo accompanying mape 
“round counts made by federal 4id personnel reughly traverse the entire Dtate in a 
nertn—south direction, With east-west spacing such as te rive at random a sampling 
that seems practical in view of the limiting factor of suitable roads. 
The pround observers inspected each water area within the sample strip with 
field glasses, recording all waterfowl seen as to species and sex. No attempt 
was made to flush all waterfowl in areas of heavy cover. 
The timing of the ground survey was planned seo that resultant species compo-= 
sition and cbhserved sex=ratio data could be applied to totals from the aerial 
survey. The 1948 ground counts were made during the period Nay 12 to Jun 7, and 
the 1949 counts during the period May 8 to June 1. 
166 
