lO 
BIRDS OF COLORADO. 
4. Species that have been taken in Colorado in winter, 
either as rare or accidental visitors. 
Stercorarius parasiticus. 
Rissa tridactyla. 
Larus argentatus smithsoni- 
anus. 
Larus atricilla. 
Xema sabinii. 
Aythya marila nearctica. 
Harelda hyemalis. 
Oidemia americana. 
Oidemia deglandi. 
Oidemia perspicillata. 
Branta canadensis butchinsii. 
Accipiter atricapillus striatu- 
Ills. 
Buteo borealis harlani. 
Nyctea nyctea. 
Colaptes auratus. 
Scolecophagus carolinus. 
lyoxia leucoptera. 
Leucosticte atrata. 
Zonotrichia coronata. 
Junco hyemalis. 
Melospiza fasciata. 
Cardinalis cardinalis. 
5. Summer residents; species that have been known to 
breed in the state. 
A. Species that breed on the plains and in the mount- 
ains or inountain parks. 
Colymbus nigricollis californi- 
cus. 
Larus delawarensis. 
Hydrochelidon nigra surina- 
mensis. 
Anas boschas. 
Anas strepera. 
Anas americana. 
Anas carolinensis. 
Anas discors. 
Anas cyanoptera. 
Spatula clypeata. 
Aix sponsa. 
Erismatura jamaicensis. 
Botaurus lentiginosus. 
Ardea herodias. 
Grus mexicana. 
Porzana Carolina. 
Fulica americana. 
Recurvirostra americana. 
Himantopus mexicanus. 
Totanus solitarius. 
Symphemia semipalmata inor- 
nata. 
Actitis macularia. 
^gialitis vocifera. 
^gialitis montana. 
Centrocercus urophasianus. 
Meleagris gallopavo mexicana. 
Zenaidura macroura. 
Cathartes aura. 
Circus hudsonius. 
Accipiter velox. 
Accipiter cooperi. 
Buteo borealis calurus. 
Buteo swainsoni. 
Archibuteo ferruginous. 
Falco mexicanus. 
Falco peregrinus anatum. 
Falco columbarius. 
Falco richardsonii. 
Falco sparverius. 
Asio wilsonianus. 
Asio accipitrinus. 
Bubo virginianus subarcticus. 
Speotyto cunicularia hypogsea. 
Coccyzus americanus occiden- 
talis. 
Ceryle alcyon. 
Dryobates villosus hyloscopus. 
Dryobates pubescens h orus. 
Ceophloeus pileatus. 
