INTRODUCTION Ixjdii 



Tachycineta bicolor : White-bellied Swallow. — Not very common. 



Hiparia riparia : Bank Swallow. — Tolerably common. 



Stelgidopteryx serripennis : Rough-winged Swallow. — Tolerably common. 



Ampelis garrulus : Bohemian Waxwing. — Rare. 



Ampelis cedrorum : Cedar Waxwing. — Rare. 



Lanius boreaiis : Northern Shrike. — Regular winter visitor. 



Lanius ludovicianus excubitorides : White-rumped Shrike. — Common sum- 

 mer resident. 



Vireo olivaceus : Red-eyed Vireo. — Not common. 



Vireo gilvus swainsoni : ^ Western Warbling Vireo. — Common. 



Helminthophila celata : Orange-crowned Warbler. — Common migrant. 



Helminthophila peregrina : Tennessee Warbler. — Rare. 



Compsothlypis americana usnece : Northern Parula Warbler. — Rare. 



Dendroica (estiva : Yellow Warbler. — Common summer resident. 



Dendroica coronata : Yellow-rumped Warbler. — Common migrant. 



Dendroica auduboni : Audubon Warbler. — Common migrant. 



Dendroica striata : Black-poll Warbler. — Tolera])ly common migrant. 



Seiurus noveboracensis notabilis : Grinnell Water-Tlirush. — Rare visitor. 



Geothlypis tolmiei : Macgillivray Warbler. — Common migrant. 



Geothlypis trickas occidentalis. — Western Yellow-throat. — Common mi- 

 grant. 



Setophaga ruticilla : Redstart. — Tolerably common migrant. 



Anthus spragueii : Sprague Pipit. — Common migrant. 



Cinclus mexicanns : Dipper. — Rare visitor. 



Oroscoptes viontanus : Sage Thrasher. — Common migrant. 



Mimus polyglottos leucopterus : Western Mockingbird. — Regular summer 

 resident ; a few pairs breed. 



Galeoscoptes carolinensis : Catbird. — Tolerably common migrant. 



Toxostoma rufum : Brown Thrasher. — Common ; breeds. 



Salpinctes obsoletus : Rock ^^'^ren. — Common migrant. 



Troglodytes aedon aztecus : Western House Wren. — Tolerably common 

 migrant. 



Certhia familiar is montana : Rocky Mountain Creepei'. — Casual visitor. 



Sitta carolinensis aculeata : Slender-billed Nuthatch. — Rare visitor. 



Sitta canadensis : Red-breasted Nutliatch. — ()cca.sional visitor, 



Sitta jjygmfea : Pygmy Nuthatch. — Rare visitor. 



Parus gambeli : Mountain Chickadee. — A flock occasionally visits the 

 city. 



Regvlus calendula : Ruby-crowned Kinglet. — Tolerably regular spring 

 migrant. 



Myadestes townsendii : Townsend Solitaire. — Regular migrant; toh'ral)ly 

 common. 



Ilylocirhla ustulata swainsoni : 01ive-b:icked Thrush. — (\)nnnon migrant. 



Mernla uiigratorin : ]vo])in. — Tolerably common sunnner resich-nt. 



Mernla niigratoria jjropinqna : Western Robin. — Frecpiently wiiitiTs. 



Sialia sialis : Bluebird. — Occasionally seen both in winter and in midsum- 

 mer ; may breed. 



Sialia arctica: Mountain Bluebird. — .\bundant breeder for species. 



' V. 'jilvus of Check-List. (F. M. B.) 



