G70 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



BIRDS- 



Order 1.— PASSERES, PASSERINE BIRDS. 

 (Section OSCINES, SINGERS.) 

 Family 1. — Tukdid^e, the Thrushes. 

 Tuydus (PlancHticus) migratoriiis, Linn., (couiiiiou robin:) 



E((h. — Continent of North America to Mexico. 



A\'e tbiiud a tlock of aboat thirty robins near the head-waters of the 

 3iadis()n lii\ er, Wyoming Territory, on the 6th of September. The snow 

 was about an inch in depth, and the liock — one of which I shot (No. 

 lioo) — seemed to be moving southward. They were quite abundant on 

 Snake River during the hitter part of September. At all other places 

 on our route robins were seldom met with. 



Galeoscoptes caroUnensis, Linn., (cat-bird :) 



Jlah. — Eastern United States to Salt Lake Valley and Washington 

 Territory. I was surprised to hud cat-birds as common in the Salt 

 Lake Valley as they are in all our Eastern States. At Ogden I found 

 one of their nests — No. 52, (10310); it was ou a bush in a marsh, about 

 tour feet above the ground, and contained live fresh eggs. 



Oreoscoptet viontmms, Baird, (mountain mocking-bird:) 



Jlah. — Rocky Mountains; south to Mexico, and along valley of Gila 

 and Colorado, and to San Diego, California. 



This plain colored songster is quite numerous about Salt Lake, where 

 we found them breeding; we also found them northward to Smike River 

 and in the Teton Basin. 1 found its nest — No. -0 (lOL'DO) — near the shore 



