OF THE UPPER MISSOURI. 
159 
Turdus aliciae, Baird. 
Gray-cheeked Thrush. Baird, General Report on Birds, p. 217. 
Was not observed above the mouth of Niobrara river on the Missouri. Most abundant 
along the wooded bottoms of the Mississippi and the Lower Missouri. 
Turdus migratorius, Linn. 
Robin. Baird, General Report on Birds, p. 218. 
I have seen this common and widely distributed bird at different seasons of the year 
throughout the Northwest. In the autumn it appears on the Yellowstone and the sources 
of the Missouri in vast numbers, especially when the autumn fruits ripen. It arrives at 
Fort Pierre about the middle of April; and though I have seen it at all seasons of the year 
I have never heard its song. 
Sialia sialis, Baird. 
Blue Bird. Baird, General Report on Birds, p. 222. 
Not uncommon throughout the Northwest; also in the vicinity of Fort Laramie. 
Sialia Arctica, Swains. 
Rocky Mountain Blue Bird. Baird, General Report on Birds, p. 224. 
Very abundant in the vicinity of the mountains. At Laramie peak and from thence to 
the Black hills it was one of the most abundant birds noticed. Its range is Upper Missouri 
to the Rocky mountains, and south to Mexico; rare on the coast of California. 
Regulus calendula, Licht. 
Ruby-crowned Wren. Baird, General Report on Birds, p. 226. 
Found somewhat rarely along the broad bottoms of the Lower Missouri. Range: From 
the Atlantic to the Pacific. 
Anthus Ludovicianus, Licht. 
Tit-lark. Baird, General Report on Birds, p. 232. 
This species must be very rare on the Upper Missouri, inasmuch as but a single specimen 
was secured, and that was observed near the Black hills. It is found throughout North 
America generally. 
Mniotilta varia, Vieill. 
Black-and-white Creeper. Baird, General Report on Birds, p. 235. 
Very abundant along the willow bottoms of the Missouri, as high up as Fort Pierre at 
least. Six specimens were obtained by our party. 
Parula Americana, Bonap. 
Blue Yellow-back. Baird, General Report on Birds, p. 238. 
This small bird is very abundant in the months of May and June along the wooded 
