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SELECTED SPECIES OF BIRDS OBSERVED IN THE 

 LOWER YELLOWSTONE VALLEY FROM SEPTEMBER 1974 TO OCTOBER 1976 





A 



Comnon Loon (Gavia adamsii) 



Western grebe ( Aechmophorus occidentalis) 



Horned grebe (Podieeps autitus ) 



Eared grebe (Podieeps aaspiaus) 



Pied-billed grebe (Podilymbus podieeps) 



White pelican (Peleoanus erythrovhynchos) 

 Double-crested cormorant (Phalacrocorax auritus) 



Whistling swan (olor aolumbianus ) 



Giant Canada goose (Branta canadensis maxima) 



Great Basin Canada goose (Branta canadensis 



moffitti) 

 Lesser Canada goose (Branta canadensis parvipes) 

 Richardson's Canada goose (Branta canadensis 



hutchinsii) 

 White-fronted goose (Anser alhifrons frontalis) 

 Snow goose (Chen hyperborea) 

 Mallard (Anas platyrhynchos) 

 Pintail (Anas acuta) 

 Gadwall (Anas strepera) 

 American widgeon (Anas americana) 

 Shovel er (Anas clypeata) 

 Blue-winged teal (Anas discors) 

 Green winged teal (Anas crecca carolinensis) 

 Wood duck (Aix sponsa) 

 Redhead (Aythya americana) 

 Canvasbackf Aythya valisineria) 

 Ring-necked duck (Aythya collaris) 

 Lesser scaup (Aythya af finis) 

 Common goldeneye (Bucephala clangula) 

 Buff el head (Bucephala albeola) 

 Ruddy duck (Oxyura jamaicensis) 

 Conmon merganser (Mergus merganser) 

 Red-breasted merganser (Mergus aerrator) 

 Turkey vulture (Cathartes aura) 

 Rough-legged hawk (Buteo lagopus) 

 Red- tailed hawk (Buteo jamaicensis) 

 Golden eagle (Aquila chrysaetos) 

 Bald eagle (Haliaeetus leucocephalus ) 

 Osprey (Pandion haliaetus) 

 Prairie falcon (Falco mexicanus) 



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