Table 124 
FOODS OF 22 LESSER SCAUP FROM FRESH ESTUARINE BAYS OF THE 
POTOMAC RIVER, GUNPOWDER RIVER, AND SUSQUEHANNA FLATS] 

Leaves, Stems and Rootstalks of 
Submerged Aquatic Plants 36% (17-60) 
Claspingleaf Pondweed 1h ( 2-35) 
Widgeongrass 1h ( 2+35) 
Wildcelery 9 ( 1-30) 
Naiad 9 ( 1-30) 
Grassleaf Pondweed 9 ( 1-30) 
Pondweed 9 ( 1-30) 
Rootstalks of Emergent Marsh Plants _5% ( +-23) 
Arrowhead 5 ( +-23) 
Grain (bait) 18% ( 5-121) 
Corn 18 ( 5-11) 
Wheat 5 ( +-23) 
Animal. Food Tz (Su-93) 
Oxytrema virginica (Gastropoda) 36 (17-60) 
Gastropoda (sp.7) 36 (17-60) 
Ammicola sp. (Gastropoda) 23 ( 7~h6) 
Gillia altilis (Gastropoda) 1h ( 2-35) 
Unionidae (sp.?) 1h ( 2-35) 
- Pelecypoda (spe?) 1h ( 2-35) 
Planorbis sp. (Gastropoda) 1h ( 2-35) 
Bittium sp. (Gastropoda) 5 ( +23) 
Cladocera (sp.?) 5 ( +23) 
Valvata tricarinata (Gastropoda) 5 ( +-23) 
Rissoidae (spe?) 5 ( +23) 
Sphaerium sp. (Pelecypoda) 5 ( +-23) 
1 Collected October=May. Percentage occurrence of foods that made up 
5% or more of the volume in individual birds. Figures in parentheses 
show 95% confidence limits. 
183 
ee — a = —___ 

