203 
Table II. - Sandhill Brood Counts, Mid-July 
Western Eastern Over-~all 
Route Route Routes 
Number of Broods Observed 42 18 60 
Total Ducklings Observed 243 127 370 
Ducklings Per Brood 6.2 
Square Miles Sampled 29.6 8.2 37.8 
Broods Per Square Mile 
1948 1.2 1.2 1.3 
1949 4.2 Zia 3.4 
1950 1.6 es 1.8 
1951 2.3 2.0 re 
1952 Ly 3 8.6 3.8 
1953 1.4 2.2 1.6 
Percent Change from 1952 - 44 - 74 - 59 
Percent Change from Average - 42 - 33 - 36 

Summary 
It is evident that, subject to the survey limitations, a significant decrease 
occurred in the sandhill breeding population and production for 1953, The sample 
is too small to show any significant change in the species composition; observations 
indicated that the loss was general for all species. The main cause of this loss 
appears to have been the unusual adverse weather conditions during the nesting 
season which either discouraged nesting activity or destroyed established nests. 
Banding Results 
Table III. - Banding Results with Sex Ratios, August, 1953 
Local Adult Local Adult Total Local Male: 
Species Male Male Female Female Bands’ 100L. Fem. 
Mallard 20 l 14 7 42 143:100 
Gadwall ‘ 8. 1 5 1 15 160:100 
Pintail 7 3 5 l 16 140:100 
Blue-winged teal 466 25 423 63 977 110:100 
Green-winged teal 6 - - 1 7 
Shoveler 1 1 2 - 4 
Redhead 4 - - - 4 
Canvasback 1 - - - 1 
Coot - - - - 1 

Total 1,038 
