234 UNIVERSITY OF COLORADO STUDIES 



Gavia imber — Common loon. 



Gavia arctica — Black-throated loon (Rowland). 



Stercorarius pomarinus — Pomarine Jaeger (Mrs. Maxwell). 



Larus delawarensis — Ring-billed gull. 



Hydrochelidon nigra surinamensis — Black tern (Rowland). 



Rissa tridactyla — Kittiwake (Mrs. Maxwell). 



Xema sabini — Sabine gull (Cooke). 



Merganser serrator — Red-breasted merganser (Rowland). 



Merganser lophodytes cucullatus — Hooded merganser (Rowland). 



Anas boschas — Mallard duck (Henderson). 



Chaulelasmus streperus — Gad wall duck (Rowland). 



Mareca americana — Baldpate duck (Rowland). 



Nettion carolinensis — Green-winged teal (Henderson). 



Querquedula discors — Blue-winged teal (Henderson). 



Querquedula cyanoptera — Cinnamon teal (Rowland). 



Spatula clypeata — Shoveller (Rowland). 



Dafila acuta — Pintail or sprigtail duck (Rowland). 



Aythya americana — Redhead duck (Rowland). 



Aythya vallisneria — Canvas-back duck. 



Aythya sp? — Greater or lesser scaup duck (Rowland). 



Aythya collaris — Ring-necked duck (Rowland). 



Clangula sp? — Goldeneye (Rowland). 



Aix sponsa — AVood duck (Cowie). 



Charitonetta albeola— Bufflehead. 



Harelda hyemalis — Old squaw duck (Rowland). 



Erismatura jamaicensis — Ruddy duck (Rowland). 



Chen hyperborea — Lesser snow goose (Rowland). 



Chen hyperborea nivalis — Greater snow goose (Rowland). 



Branta canadensis — Canada goose (Rowland). 



Ardea herodias — Great blue heron. 



Ardea candidissima — Snowy egret (Hersey). 



Nycticorax nycticorax naevlus — Black-crowned night heron (Bragg), 



Rallus virginianus — Virginia rail (Rowland). 



Fulica americana — American coot, mudhen (Henderson). 



Recurvirostra americana — American avocet (Cowie). 



Himantopus mexicanus — Black-necked stilt (Rowland). 



Aegialitis vocifera — Killdeer. 



Philohela minor — American woodcock (Smith, Rowland). 



Gallinago delicata — Wilson snipe (Rowland). 



Micropalama himantopus — Stilt sandpiper (Rowland). 



Tringa fuscicollis — White-rumped sandpiper (Rowland). 



Totanus flavipes — Yellow-legs (Rowland). 



Totanus melanoleucus — Greater yellow-legs (Rowland). 



Actitis macularia — Spotted sandpiper (Blanchard). 



