Table 21 
SPECIES COMPOSITION OF WATERFOWL POPULATIONS IN THE PATUXENT RIVER SECTION 


January 
Populations: Seasonal Population Changes in 1958-59 
Average (Percentages ) 
Percentages, 
1955~58 Oct.2-10 Nov.3-12 Dec,1l-12 Jan.7-13 Mar.3-16 

Whistling Swan 1 7 19 10 
Canada Goose 1 3 + + 
Mallard 3 18 29 12 16 1h 
Black Duck 5 35 17 9 17 8 
Pintail 1 8 1 9 
Green-winged Teal 5 8 + 
Blue=-winged Teal + 
American Widgeon 1 35 3h h 2 1 
Wood Duck + + + + 
Redhead 5 8 2 
Ring-necked Duck + 
Canvasback 31 11 35 11 
Scaup 35 36 17 
Common Goldeneye 
and Bufflehead HM + 3 7 11 
Oldsquaw + + + + 
Scoters + 1 + 
Ruddy Duck 7 3 2 if 2 15 
Mergansers 1 + + 1 
American Coot 5 1 2 1 
Unidentified Ducks + | 1 
Total Percent 100 100 100 100 100 100 
Total Populations 29,900 1,000 7,400 14,800 4,100 6,700 
94 
