\ 



\ 



1921 BIRDS OF MONTANA 167 



i903b, p. 295). The nest has been found frequently at Flathead Lake, wher<' 

 this bird is the commonest nesting species. East of the divide it is less common, 

 and I know of no records of the finding of the nest in that part of the state. 



324. Hylocichla guttata guttata (Pallas) 



Alaska Hermit Thrush 

 A migrant. One was taken at Dntton, May 13, 1917, by DuBois. The speci- 

 men was sent to me and later to the Biological Survey, where the identification 

 was confirmed. Another was taken in Custer County, October 12, 1919, and 

 identified by Dr. Bishop (Hedges, MS). This form may be not uncommon as 

 a migrant, birds belonging to it doubtless having been mistaken for auduboni 

 v/hen not collected. 



325. Hylocichla guttata auduboni (Baird) 



Audubon Hermit Thrush 



A summer resident of the mountains in the western half of the state. Ap- 

 parently most abundant in southwestern ]\Iontana,, and rare in other mountain- 

 ous regions. Not reported from northwestern Montana west of the continental 

 divide, but this may be because most observations there have been made at ele- 

 vations too low for the occurrence of this bird. Breeds in the Canadian zone. 

 Not known from the eastern half of Montana even in migrations. The eastern- 

 most points where it has been found are the Belt Mountains (Williams, 18901), 

 p. 292), and Park County, west of the Yellowstone River. This species is rare 

 in Park and Gallatin counties, but quite common in Jefferson, Silver Bow and 

 Deer Lodge counties. It is unknown from Flathead Lake, has been found in the 

 Bitterroot Valley only once in migration, and is not known to breed in Teton 

 ( *ounty. It has been found in Glacier Park in late August (Coues, 1874b, p. 549) . 



The migrations take place in May and September. Dates of spring arrival 

 are: German Gulch, May 25, 1910; Anaconda, May 17, 1911; Choteau, May 18, 

 1912; Corvallis, May 18, 1912 (Bailey, MS). Fall dates are: Gallatin County, 

 September 11, 1890 (Richmond and Knowlton, 1894, p. 308) ; Pipestone Creek, 

 Jefferson County, September 28, 1909; Gold Creek, September 10, 1910; and 

 Sun River, September 12, 1912, 



The nest has been found twice in the state. One with fresh eggs was dis- 

 covered near Fort Ellis, Gallatin County, July 16, 1872 (Merriam, 1873, p. 

 674). A nest containing two eggs was found in the mountains of the Big Hole 

 Basin, June 10, 1913 (Forrest, 1914, p. 197). 



326. Planesticus migratorius propinquus Ridgway 



Western Robin 

 An abundant summer resident throughout the state. Reported by all ol)- 

 servers from all parts of Montana. Breeds in the Upper Sonoran, Transition 

 and Canadian zones. Found nesting in cottonwood groves and in willow thick- 

 ets, about buildings in the prairie region and in the mountain valleys, in various 



