34 Proceedings of the 



758a. Olive-backed Thrush — Hylccichla ustulata szvainsomi (Cab.). In 



Pine ridge canyons in summer. 

 *76]a. Western Robin — Plancsticiis mignitorius propinqua (Ridg. ). 



Western. 

 *768. Mountain Bluebird — Sialia currucoidcs (Bechst.). Western. 



III. — Species occurring in the state only in spring and fall 



MIGRATIONS AND BREEDING NOT PROBABLE, THOUGH INDI- 

 VIDUALS MAY BE SEEN IN SUMMER, PRESUMABLY BIRDS 

 THAT HAVE FALLEN OUT IN MIGRATION FROM SOME CAUSE, 

 AS PERHAPS, IN THE CASE OF SHORE BIRDS AND DUCKS, IN- 

 JURY BY SHOT WOUNDS. SOME OF THEM MAY REMAIN IN 

 THE WINTER DURING MILD WEATHER 



1. Western Grebe — Acchmophorus occidenlalis Law'r. Straggler 



from the west. 

 7. Loon — Gavia immer (Briinn.). 



36. Pomarine Jaeger — Stercorarius poiiiarinus (Temm.). Rare. 



37. Parasitic Jaeger— Stercorarhis parasiticus (Linn.). Rare. 

 51. Herring Gull — Larus argentatus Pont. 



54. Ring-billed Gull — Larus delazvarensis Ord. A possible breeder 

 northward in the sand hills. 



59. Franklin Gull — Larus franklinii Swain. & Rich. 



60. Bonaparte Gull — Larus Philadelphia (Ord). 

 64. Caspian Tern — Sterna caspia Pall. 



70. Common Tern — Sterna hirundo Linn. 

 120. Double-crested Cormorant — Phalacrocorax auritus (Less.). 



125. White Pelican — Pelecanus crythrorhynchos Gmel. May have once 



bred. 



126. Brown Pelican — Pelecanus occidentaUs (Linn.). A straggler only. 



129. Merganser — Mergus americanus Cass. May winter. 



130. Red-breasted Merganser — Mergus serrator Linn. May winter. 

 133. Red-legged Black Duck — Anas ruhripes Brewst. 



133a. Black Duck — Anas rubripes tristis Brewst. A possible breeder. 

 136. European Widgeon— Mart'ro pcnclopc (Linn.). Accidental. 

 141. Cinnamon Teal— Quer que dula cyanoptera (VieilL). Rare: more 

 common westward. 



148. Scaup — Marila niarila (Linn.). 



149. Lesser Scaup — Marila affinis (Eyt. ). A possible breeder in the 



sand hills, northward. 

 153. Buffle-head — Charitonetta albcola (Linn.). May winter. 

 169. Snow Goose — Chen hyperborea (Pall.). 

 169a. Greater Snow Goose — Chen hyperborea nivalis (Forst.). 

 169.1. Blue Goose — Cheri caeruleseens (Linn.). 



