Table I. - Summary of Breeding Pair Counts on the Elkhorn Study Area 
—————— Tl ee ee St rr a in 
Breeding Pairs Per Square Mile 
Species 5/12 5/2 6/11-13 29-7/1 
Mallard 33.6 30.4 38.2 18.6 
Gadwall 2.2 1.6 2.4 1.4 
Baldpate 5.0 3.2 3.6 4.0 
Pintail 12.0 7.6 6.2 2.4 
G-w. Teal z2.6 2.6 1,4 3.2 
B-w. Teal 24.2 26.4 30.6 23.2 
Shoveler 7.8 5.8 5.4 3.6 
Redhead = - 8 8 
Ringneck - = 4 - 
Canvasback 2.0 4.0 4.0 aes 
Lesser scaup .8 3.8 3.2 3.8 
Ruddy duck - 6 1.4 z2.4 
Sa ap ye rans 
Total Ducks 90.2 86.0 98.6 63.6 
Table II. - Summary of Nesting Studies on the Elkhorn Study Area 
a a an pe 
Destroyed Total 
Percent No. 

Species Crow Skunk Squirrel Deserted Flooded Hatched Success Nests 
Mallard 18 7 6 7 21 32.9 63 * 
Pintail 3 2 1 - 1 12.5 8 
B-w. Teal 5 1 1 4 28.6 14 
Shoveler 1 1 Z = a 6 4 
Ringneck - - - - 1 100.0 1 
Canvasback - - 5 50.0 10 
Ruddy duck - - 1 - 2 33.3 3 * 
Total 27 11 14 12 34 32.7 104 
* One active mallard nest and one active ruddy duck nest are not 
included in these totals. 
Table V. - Broods by Age Classes on July 16, 1953 on Elkhorn Study Area* 



Transect Age Classes Broody Total For Broods Per 
Segments I Il I Hen Transect Square Mile 
A 23 6 3 3 35 28.0 
B 12 4 2 1 19 15,2 
C 12 5 Z 6 25 20.0 
D 9 0 1 1 11 8.8 
Total 56 15 8 11 90 18.0 
% in each 62.2 16.7 12.2 99.9 
Age Class 
* Including Coot. 
