Douglas Caldwell:
Bufflehead (bucephala albeola)
Douglas Caldwell:
Common Merganser (mergus merganser)
Douglas Caldwell:
Common mergansers (mergus merganser)
Douglas Caldwell:
Common Merganser, Female (mergus merganser)
Douglas Caldwell:
Hooded merganser (female & disappearing drake) (Lophodytes cucullatus)
Douglas Caldwell:
Hooded Merganser (lophodytes culcullatus)
Douglas Caldwell:
Hooded Mergansers (Lophodytes cucullatus) Minnesota Valley National Wildlife Refuge
Douglas Caldwell:
Female Long-tailed Duck (Clangula hyemalis)
Douglas Caldwell:
Long-tailed Duck (clangula hyemalis)
Douglas Caldwell:
Long-tailed Duck (clangula hyemalis)
Douglas Caldwell:
Long-tailed Ducks (Clangula hyemalis)
Douglas Caldwell:
Mallard (Anas platyrhynchos) Mississippi River, St Paul MN
Douglas Caldwell:
Wood Duck (Aix sponsa)
Douglas Caldwell:
Wood Duck (aix sponsa)
Douglas Caldwell:
Wood Duck pair
Douglas Caldwell:
Gadwall (Anas strepera)
Douglas Caldwell:
Green-winged Teal (Anas carolinensis)
Douglas Caldwell:
Wood Duck (Aix sponsa)
Douglas Caldwell:
Blue-winged Teal (Anas discors)
Douglas Caldwell:
Greater Scaup (Aythya marila)
Douglas Caldwell:
Pied-billed Grebe and chicks (Podilymbus podiceps)
Douglas Caldwell:
Northern Shoveler (Anas clypeata)