Table 119 
FOODS OF 19 GREATER SCAUP FROM FRESH ESTUARINE BAYS OF THE 
SUSQUEHANNA FLATS, AND GUNPOWDER AND POTOMAC RIVERS?+ 

Leaves, Stems and Rootstalks of 
Submerged Aquatic Plants 8% (60-97) 
Wildcelery 7h (8-91) 
Pondweed 11 (¢ 1-3) 
Muskgrass 5 ( +26) 
Seeds 2% (20-67) 
Pondweed 32 (12-57) 
Sago Pondweed 5 ( +~26) 
Widgeongrass 5 ( +26) 
Animal Food ThA (h8~91) 
Gastropoda (sp.7) 37 (16-62) 
Oxytrema virginica (Gastropoda) 26 ( 9-52) 
Amnigola limosa (Gastropoda) 11 ( 1-3h) 
Gemma gemma ( Pelecypoda) 5 ( +26) 
Amphipoda 5 ( +-26) 
1 Collected November and late February. Percentage occurrence of foods that 
made up 5% or more of the volume in individual birds. Figures in parentheses 
show 95% confidence limits. 
179 
