372 U.S. NATIONAL MUSEUM BULLETIN 23 7 part i 



Banding carried on at two roosts approximately 8 miles apart 

 west of Salt Lake City, indicated the birds returned night after night 

 to the same roost. Only rarely did birds banded at one roost appear 

 at the other, even when released more than 15 miles away and an 

 equal distance from either roost. 



Distribution 



Range. — Central Rocky Mountains. 



Breeding range. — The black rosy finch breeds in the high mountains 

 of north to southwestern Montana (Bitterroot Range south of Lolo 

 Pass, Anaconda Range, Madison Range, and Crazy Mountains). 

 East to western and northcentral Wyoming (Big Horn Mountains, 

 Absaroka Range, Teton Mountains, Gros Ventre Range and Wind 

 River Range). South to northern Utah (Uinta Mountains and south- 

 ern Wasatch Mountains) and northeastern Nevada (Jabridge Peak 

 and Ruby Mountains). West to central and western Idaho (Lost 

 River Range, Sawtooth Mountains, and Seven Devils Mountains) . 



The above range includes the areas (Seven Devils Mountains and 

 Bitterroot Range) where intergradation or hybridization with the 

 gray-crowned rosy finch occurs freely. 



Winter range. — In winter the black rosy finch is found in the valleys 

 and lower elevations north at least as far as northwestern Wyoming 

 (Mammoth, Dubois, Jackson, LaBarge and Pinedale). East to 

 central Colorado (Boulder, Evergi-een, and Canon City). South to 

 northern New Mexico (northwest of Vermejo Park), southern Utah 

 (Kanab and St. George), and northern Arizona (Grand Canyon). 

 West into Nevada (Pioche, Tonopah, and Reno) and as far as eastern 

 California (Bodie and Chats). 



Casual records. — Casual in eastern Oregon (WaUowa Mountains) 

 and eastern Montana (Terry). 



Migration. — Late dates of spring departure are: Colorado — Canon 

 City, April 20; Walden, April 18. Utah— Provo, April 20. Wyo- 

 ming — Yellowstone National Park, April 5. Montana — Anaconda, 

 May 27. 



Early dates of fall arrival are: Wyoming — Yellowstone National 

 Park, October 9; Sheep Mountain, November 24. Utah — Provo, 

 October 10; Saltalr, October 31. Colorado — Golden, November 13. 

 New Mexico — Vermejo Park, Colfac County, November 29. 



