1921 BIRDS OP MONTANA 147 



282. Dendroica coronata (Linnaeus) 



Myrtle Warbler 

 A migrant in eastern Montana, not found west of the prairie region. Fort 

 Keogli, common in spring (Thorne, 1895, p. 218) ; Great Falls, one taken May 

 !.', 1887 (Williams, 1888a, p. 16) ; Custer and Dawson counties (Cameron, 1908a, 

 p. 50) ; Lew-istown, common migrant, taken April 26, 1903 (Silloway, 1903a, p. 

 63) ; Terry, four years' average May 6, earliest May 2, 1894 (Chapman, 1907, 

 p. 143). Three specimens, Tusler, April 27, 1902; Fort Keogh, May 4, 1902, and 

 .Miles City, May 3, 1902 (Hedges, coll. Univ. Montana). 



283. Dendroica auduboni auduboni (J. K. Townsend) 



Audubon Warbler 



A common summer resident in all mountainous parts of the state, and a 

 migrant probably throughout the state, though records are not very common 

 from the prairie region. Breeds in all the mountain ranges, to the most eastern, 

 and may also breed in pine hills in the extreme eastern part of the state. Re- 

 ported by all observers in mountainous regions. Breeds in evergreen forests in 

 the Canadian zone, and locally in the Transition. Appears indifferent to the 

 different types of evergreen forest, being equally common in pine, fir or spruce. 

 The only records from extreme eastern ^Montana are from Little Pumpkin Cieelv, 

 April 23, 26 and 27, 1900, and from Fort Keogh, May 25, 1902 (Hedges, coll, 

 Univ. Montana). This species breeds in the pine hills of Harding County, South 

 Dakota (Visher, 1911, p. 15), and therefore should be expected to breed in simi- 

 lar places just across the Montana border, such as in the Long Pines of Carter 

 County. 



^Migration dates, beside those given above, are as follows : Spring, average 

 at Great Falls, April 29; average at Columbia Falls, April 23 (Cooke, 1904a, p. 

 05) ; Bridger Creek, Gallatin County, May 9, 1909 ; Big Hole River, May 6, 1910, 

 Anaconda, May 1, 1911 ; Choteau, May 12, 1912 ; Bitterroot Valley, ]\Iay 4, 191(», 

 May 12, 1911, April 28, 1912, April 27, 1913 (Bailey, MS). Fall: Leaves north- 

 ern Montana about October 10 (Cooke, 1904a, p. 66) ; Bozeman. October 17, 1908 ; 

 Pipestone Creek, Jefferson County, September 30, 1909. 



A nest w^as found in the Big Horn Mountains at ;m elevation of 6500 feet, 

 June 17, 1880. It contained five eggs advanced in incubation (^lerrill, 1881, p. 

 205). A number of nests have been found at Flathead Lake, the earliest with 

 five eggs June 1, 1906 (Silloway, 1906, p. 109), and the latest with newly 

 iiatched young July 2, 1900 (Silloway, 1901a, p. 17). 



284. Dendroica castanea (Wilson) 



Bay-breasted Warbler 

 One taken at Big Sandy May 24, 1903, by Eugene Coubeaux (Cooke, 1904a, 

 p. 74). 



285. Dendroica striata (J. R. Forster) 



Black-poll Warbler 

 A migrant in eastern Montana, found only in the prairie region of the 



