170 
Table 3. -- The Ratio of Observed Broods to Breeding Pairs 
WESTERN EASTERN 
1948 1949 1950 1948 1949 1950 
Pairs per Square Mile 16 20 15 25 --- 22 
Broods per Square Mile 1.2 4.2 i LF --- 2.2 
Pairs Required to Produce . 13 5 9 14 --- 10 
one Brood 

1 From Table 1, 
From Table 2. 


Table 4. -- The Species Composition of Observed Broods 
WESTERN BROODS DUCKLINGS AVERAGE 
Species 1948 1949 1950 1948 1949 1950 1948 1949 1950 
Mallard 6 7 12 43 44 78 7 6 6 
Gadwall. 1 3 - 8 21 - 8 7 = 
Baldpate 1 - - 7 - - 7 = 2 
Pintail 6 4 3 40 27 21 7 7 7 
Blue-winged teal 13.10 12 97 5971 7 6 6 
Shoveler - - ] - - 3 - - 3 
Redhead 3 As 9 15 78 67 5 6 7 
Canvasback - - 3 - - 19 - - 6 
Ruddy 6 3 9 32 22 56 5 7 6 
Unidentified 4 2 4 30 18 17 7 9 4 
Totals 40 42 53 272 269 332 7 6 6 
EASTERN BROODS DUCKLINGS AVERAGE 
Species 1948 1949 1950 1948 1949 1950 1948 1949 1950 
Mallard 5 9 7 40 73 46 8 8 7 
Gadwall - - - - - - - - = 
Baldpate 1 - = 7 - - 7 - - 
Pintail 7 8 5 50 53 24 7 7 5 
Blue -winged teal 6 15 14 ' 54 124 123 9 8 9 
Shoveler - - = = - ~~ 8 - 
Redhead - : = = = = 2 . = 
Canvasback - - = : = = - e = 
Ruddy l - _o. 2 - = - - 
Unidentified ms - 4 - ‘zs = = . = 


Totals 20 32 26 153 250 193 7 8 7 
