
Table 1. -- Breeding Populations, 1949-1950 (12 transects-50.4 square miles) 

Breeding Pairs 


Percent Change 
53 


1949 1950 For each In terrns of total 
Species May 14-June 6 May 26-June 1 Species _for all species 
Mallard 382 416 + 8.9 ~~ 1.7 
Pintail 113 141 $24.8 — ~ 1,5 
Baldpate 181 181 ~« an 
Gadwall 112 97 —13.4 — 0.8 
Shoveler 104 116 A11.5 ~ 0.6 
B-w. teal 476 643 35.1. —~ 8,7 
G-w. teal 88 104. 718.2 +~ 0.8 
Canvasback 136 124 — 8,8 — 0.6 
Redhead 106 126 18.9 41.0 
Ruddy duck 43 46 + 7.0 ue 
Lesser scaup 140 142 +1.4 -- 
Others 33 69 #109. 1 41.9 
Total pairs 1,914 2,205 +~15.2 
Pairs per 
Square mile 38.0 43.8 
Total ducks 4, 351 5,102 ~17.3 
Ducks per 
Square Mile 86.3 101.2 
Table 2. -- Production and Age-Class Distribution of Broods, 1949-1950(7 transects) 
' Age Class Age Class Age Class Total Percent of 
Species - ll 1il Total 
Mallard 7 9 12 28 13 
Pintail 2 4 14 20 9 
B-w. teal z20 8 12 40 19 
Baldpate 12 8 l 21 10 
Gadwall 10 3 0 13 6 
Canvasback 26 23 13 62 29 
Redhead 8 3 2 13 6 
Ruddy 18 0 0 18 8 
Total 103 58 54 215 
Percent in Age Class 48 27 25 
Time of Census - July 24-27, 1950 
Age Class Age Class Age Class Total Percent of 
Species 1 11 lll Total 
Mallard 4 3 5 12 9 
Pintail zZ 1 6 9 6 
B-w. teal 13 8 3 24 17 
Baldpate 8 2 2 12 9 
Gadwall 3 0 0 3 2 
Canvasback 28 23 5 56 40 
Redhead 10 0 0 10 a: 
Ruddy 15, 0 0 15 tl er 
Total 83 37 21 141 
Percent in Age Class 59 26 15 
Time of Census - July 5-24, 1949 
