30 
THE CONDOR 
Vol. XIV 
August 27, 1910. This species was very abundant in fall migration on Gold 
Creek, Powell County, after August 18, 1910. 
Petrochelidon lunifrons lunifrons. Cliff Swallow. Common summer resident 
in the valleys. Migration dates are May 30, 1910, and May 28, 1911. 
Hirundo erythrogastra. Barn Swallow. Summer resident in the valleys. 
Tachycineta thalassina lepida. Northern Violet-green Swallow. Summer 
resident. Migration dates May 6, 1910, and May 12, 1911. 
Stelgidopteryx serripennis. Rough-winged Swallow. Summer resident. Not 
common, but seen in the valleys throughout the region. Migration dates May 30, 
1910, and May 21, 1911. 
Bombycilla garrula. Bohemian Waxwing. Winter resident. Migration dates 
October 13, 1910, and March 29, 1910. 
Bombycilla cedrorum. Cedar Waxwing. Summer resident. I found a nest 
containing young near Anaconda, August 17, 1910.- 
Lanius borealis. Northern Shrike. Winter resident in the valleys. Migration 
date October 23, 1910. 
Lanius ludovicianus migrans. Migrant Shrike. On May 14, 1911, I secured a 
bird of this species, which Dr. Bishop stated was certainly not L. 1. cxcuhitorides 
and believed was probably of this subspecies. 
Vireosylva olivacea. Red-eyed Vireo. One seen near Anaconda June 3, 1911. 
Vireosylva gilva swainsoni. Western Warbling Vireo. Common summer resi- 
dent. Most abundant in aspen groves in the mountains. Migration dates May 28, 
1910, June 3, 1911, and August 27, 1910. 
Lanivireo solitarius cassini. Cassin Vireo. I saw several of these birds on 
Willow Creek, Powell County, September 12 and 13, 1910. 
Vermivora celata (subspecies ?). Orange-crowned Warbler. Summer resident 
in the mountains. More abundant in migrations. Occurs in the breeding season 
principally in aspen groves. Migration dates May 28, 1910, May 27, 1911, and 
September 4, 1909. 
Dendroica aestiva aestiva. Yellow Warbler. Common summer resident of the 
valleys. Migration dates May 28, 1910, and May 21, 1911. 
Dendroica auduboni auduboni. Audubon Warbler. Summer resident in the 
mountains. Migration dates May 6, 1910, May 1, 1911, and September 30, 1909. 
Seiurus noveboracensis notabilis. Grintiell Water-Thrush. Seen twice in 
German Gulch, Silver Bow County, May 16, 1910, and on Gold Creek, Pow'ell 
County, August 20, 1910. 
Oporornis tolmiei. Macgillivray Warbler. Summer resident in the foothills up 
to 5,500 feet. 
Geothlypis trichas occidentalis. Western Yellowthroat. Summer resident of 
the valleys and foothills to about 5,500 feet. Migration dates are May 21, 1911, 
and September 21, 1910. 
Wilsonia pusilla pileolata. Pileolated Warbler. Summer resident of willow 
thickets in the mountains above 5,500 feet. Occurs in the valleys in migrations. 
Migration dates are May 28, 1910, May 14, 1911, September 14, 1909, and Sep- 
tember 17, 1910. 
Setophaga ruticilla. Redstart. Rather rare summer resident. Migration 
dates May 28, 1910, May 21, -1911, and August 21, 1910. 
Anthus rubescens. Pipit. Regular fall migrant in the valleys, usually found 
in company with Horned Larks. Also very abundant in the spring of 1911, though 
this is the only year that I have seen it in spring in Montana. Migration dates are 
September 14 to October 17, 1909, September 11 to October 23, 1910, and April 15 
to May 20, 1911. 
