£6 
Table 3. Species Composition and Trends | 
| . % OF Percent 
Corrected Species Indices* 1959 — 1958 Change from 
Species Bastern Central Western Totel Index Index 1958 to 1959 
B. W. Teal 17 , 363 13,910 18,870 50,143 50.3 71, 301 - 29.7 
Mallard 2,206 5,780 4,159 12,145 12.2 28 , 067 - 56.7 
Baldpate 545 103 722 * 1,370 1.4 1,906 - 28.1 
Shoveler 2,298 2,436 5,341 10,075 10.1 20,247 - 50.2 
Pintail 4, 834 1,986 5,013 11,833 11.9 32, 669 - 63.8 
Gadwall hho 1,065 4,334 5,839 5.9 10,085 - 42,1 
Scaup 329 483 826 1,638 1.6 1, 326 f 23.5 
G. W. Teal 228 103 - 331 0.3 751 ~ 55.9 
Redhead - 753 1,815 2,568 2.6 6,486 - 60.4 
Ringneck - 787 ~ 787 0.8 147 ¢ 381.0 
Bufflehead - 205 - 205 0,2 - = 
Ruddy 412 2,322 2,734 2.7 3,391 - 19,4 

a gn 2 re 
= a rar 


Total 28, 349 28, 023 43, 402 99,774 100.0 176,376 -. Wk 

* All non-breeding ducks in groups at the time of the surveys were subtracted from 
the aerial index. Al] lone males observed were assumed to be territorial and to 
represent a hen nesting; these hen-on-nests have been added to the breeding duck 
index to obtain the corrected indices. 
ee ary i 
SS — 
