Table 19 
SPECIES COMPOSITION OF WATERFOWL POPULATIONS IN THE CENTRAL POTOMAC SECTION 



January 
Populations: Seasonal Population Changes in 1958-59 
Average (Percentages) 
Percentages, 
1955-58 Oct.2-10 Nov.3-12 Dec.1-12 Jan.7-13 Mar.3-16 
Whistling Swan | 2 1 3 5 1 
Canada Goose 1 3 2 3 + 
Mallard 2 3 2 2 1 
Black Duck 6 h h 5 8 3 
Gadwall 2 6 2 2 6 
Pintail 1 + i n 
Green-winged Teal + + 
Blue-winged Teal + 
American Widgeon h 91 32 15 hy 9 
Wood Duck + 
Redhead 10 + 3 
Ring-necked Duck + + a5 + Ar 
Canvasback 37 2 31 2 27 
Scaup 3 10 3 1h 
Common Goldeneye 
and Bufflehead 1 2 3 16 1 
Oldsquaw + 
Scoters + + + + + 
Ruddy Duck 20 TQ) 9 13 23 
Mergansers 1 + + 
American Coot 10 4 6 13 2 1 
Unidentified Ducks + + 
Total Percent 100 100 100 100 100 100 
Total Population 48,500 5,000 32,200 62,700 33,100 27,100 
92 
