Hi all,
    I checked a few places on the Potomac this afternoon. The highlights were:

Riley's Lock
     Red-throated Loon 
     Horned Grebe - 2
     Winter Wren

Pennyfield Lock
    Northern Pintail - 1 female
    Gadwall - 1 male
    Green-winged Teal - 7
    American Black Duck - 3
    Sharp-shinned Hawk


Mike Ostrowski
North Bethesda, MD