140 PACIFIC COAST AVIFAUNA No. 14 



iind orrstrra. migrating' in tli*' eastci'n jiart and hi'i'cdiiig in the western fsee 

 Oherliiilser, 19(15. p. 24:i ) . 



279. Vermivora celata lutescens (Ridgwa.v) 



1jUtescp:nt W.mjblek 

 A migrant in western Montana, probably chiefly, ii' not entirely, west of the 

 (ontinental divide. This form is reported from Columbia Falls, where five years 

 yive an average spring ai'rival of May 5, tlie earliest April 30, 1897 (Cooke. 

 liHJia, p. -12). A fall date in this same locality is September 12, 1895 (Chapman, 

 1907, p. 88). 



280. Vermivora peregrina (Wilson) 



Tennessed; W.\rbler 

 A rare sumiiiei' resident of northwestern .Montana, evidentl.y l)reeding local- 

 ly. This form was found at Flathead Lake in the sannuer of 1904, when a male 

 WHS taken June 29, a female was observed with nesting material July 3, and 

 oilier males were heard in song until the end of July fSilloway, 1905a, j). 21). 

 This bird occurs in migration in the eastern part of the state. Five were taken 

 at Miles (^it.v. May 13 t^ 21, 1920 (Hedges, IMS). 



281. Dendroica aestiva aestiva (Gmelin) 



Yellow Warbler 



An abundant slimmer resident throughout the state. Reported by all ob- 

 servers, from all parts of the state. Breeds in the I'pper Sonoran and Transi- 

 tion zones, in the prairie region and in the mountain valle.ys, and sometimes in 

 the lower mountain canyons. Breeds in Cottonwood groves, willow thickets, and 

 similar habitats. 



Arrives in the sio'ing in .Alay and le.ives in August. The average date of 

 arrival at Great Falls is May 16, and the earliest ;\Iay 11, l.s91. according to 

 r'liapman (1907, p. 115). There is an earlier date of arri\al recorded from 

 Great Falls, however, May 9, 1887 (Williams, 1888a, p. \t>). Other records of 

 spring arrival are : Sedan, Gallatin County, May 19, 1909 ; German Gulch, Silver 

 I'.ow County, May 28. 1910; Silver Bow, ;\lay 21, 1911: Choteau, May 22, 1912: 

 Bitterroot Valley, May 27, 1910; May 21, 1911 ; and May 18, 1913 (Bailey, MS) ; 

 Button, aiay 26, 1915, and -May 21, 1916 (DuBois, MS). Fall dates are: Great 

 Falls, September 13, 1899 (Chapman, 1907, j). 115) ; Bozeman. August 25, 1908, 

 Logan, Gallatin County, August 25, 1909; Gold Creek, Powell County. August 

 26, 1910; Choteau, August 18, 1911. 



The nest has been found and recorded frequentl.y. All records, howeve;-, 

 are in June and early July, and there is no indication of more than one brood. 

 The earliest nest is one which I observed at Choteau. It was found with three 

 eggs June 11, 1912. Two of the eggs hatched June 21, the third being infertile. 

 The young were full grown and left the nest June 28. The latest record is that 

 of a .young bird .just out of the nest July 4, 1912. at Choteau, Other records an- 

 all between these two dates. 



