152 PACIFIC COAST AVIFAUNA No. 14 



state, and a common migrant in tlic mountain valleys and at the edge of the 

 prairie region near the mountains. A rare migi-ant in the eastern part of th' 

 state. Breeds in the Canadian zone, in willow thiekets along mountain streams 

 or bordering mountain lakes. West of the divide the Pileolated Warbler breeds 

 in arbor-vitae forests. The eastern limit of its breeding range, as far as known, 

 is marked by Teton and Lewis and Clark counties in the northern part of the 

 state (Saunders, 1914a, p. 142) and by Gallatin County (Saunders, 1911a, p. 47) 

 and Park County in the southern part. The species has not been reported in the 

 breeding season east of these points. The only records in eastern ^Montana are 

 from Fort Keogh, September 22, 1900 (Hedges, coll. L. B. Bishop), and from 

 Custer County, August 24, 1919 (Hedges, MS). 



The migrations take place in late May and in August and Septemlx'r. In 

 the valleys, this warbler is most conspicuous during the fall migration. It be- 

 comes very abundant about the middle of August, remaining so till the first cold 

 weather, which comes about September 1, and stragglers are seen up to the mid- 

 dle of the month. Dates of spring arrival are : Great Falls, May 23, 1892 

 (Cooke, 1904a, p. 129) ; Bozeman, June 6, 1909; German Gulch, ISlay 28, 1910: 

 Anaconda, May 14, 1911; Choteau, May 25, 1912; Bitterroot Valley, May 20, 

 1918 (Bailey, MS) ; Belton, May 80, 1914; Teton River, May 28. 1915 (DuBois, 

 .MS). Fall dates are : Great Falls, August 17, 1889 (Cooke, 1904a, p. 129) ; Bear 

 Canyon, Gallatin County, August 26, 1908; MiW Creek, Deer Lodge County, 

 September 14, 1909; Willow Creek, Powell County, September 17, 1910; Willow 

 Creek, Lewis and Clark County, August 28, 1911 ; West Fork of Sun River, 

 Lewis and Clark County, August 2(), 1912; Belton, September 15, 1915 (DuBois, 

 .\1S). 



The nest has been found t^vice in the state. One was discovered at Lake 

 ^lacDonald, Missoula County. June 24, 1901, which contained four eggs ad- 

 vanced in incubation (Silloway, 1901a, ]). 84). A nest with five eggs was found 

 in Pipestone Basin, Jefferson County, June 16, 1910 (Saunders, 191(H1, p. 199). 



296. Setophag-a ruticilla (Linnaeus) 



Redstart 



A sunnner resident throughout most of the state, but not reported from the 

 Bitterroot Valley. Breeds in the Transition and ri)per Sonoran zones, in dense 

 thickets of willow and alder, particularly in the vicinity of water. Connnon at 

 low elevations, rather rare above 4000 feet in the northern ])art of the state, and 

 above 4500 in the southern part. Found throughout the Transition zone. About 

 Flathead Lake, breeds in areas of mi.xed evergreens and bi-oad leaf trees, such 

 as Cottonwood and birch, mixed with fir and tamarack. 



Migrations take place in IVIay and September. The average arrival at Terry 

 is May 16, at Great Falls, May 21, and at Columbia Falls, May 24 (Cooke, 1904a. 

 p. 188). Other dates are : Pozeman, May 27, 1909; German GuU-h, May 28, 191(1, 

 Silver Bow, May 21. 1911; Choteau, May 22, 1912; Lewistowu, May 17, 1!)(>8 

 (Silloway, 1908a, p. 65) ; Belton, iMay 80. 1914; Teton River. May 28. 1!)15, and 

 May 21. l!)l(i (I)uPois, .MS). Fall dates are: Great Kails, Srptrinher 14, 1889 

 (Cooke, l!)()4a. p. 188) ; Gold Creek, .\ugust 21. 1910. 



