Table 97 
FOODS OF 11 REDHEADS FROM FRESH ESTUARINE BAYS OF 
THE POTOMAC, GUNPOWDER, AND BUSH RIVERS* 


Leaves, Stems and Rootstalks of 
Submerged Aquatic Plants | 64% (30-90) 
Pondweed 4S (16-77) 
Sago Pondweed 18 ( 2-52) 
Naiad 9 ( t-h2) 
Grassleaf Pondweed 9 ( +—)2) 
Seeds 55% (23-8h) 
Naiad 18 ( 2-52) 
Sago Pondweed 9 ( +¥-)2) 
Widgeongrass 9 ( +-l2) 
Common Waterweed 9 ( +-)2) 
Bulrush 9 ( #-h2) 
Wildrice 9 ( +-l2) 
Animal Food 18% ( 2-52) 
Planorbis parvus (Gastropoda) 18 ( 2-52) 
1 Collected during late fall, winter, and early spring. Percentage occur- 
rence of foods that made up 5% or more of the volume in individual birds. 
Figures in parentheses show 95% confidence limits. 
157 
