I70 Anthony' oh Birds of Washington County, Oregon. [April 



resident. A colony of about two hundred built at Beaverton this spring, 

 for the first time in the memory of its inhabitants. 



88. Hirundo erythrogaster. Barn Swallow. — Rather rare; seen for 

 a few days only in spring and fall. 



89. Tachycineta bicolor. White-bellied Swallow. — Abundant 

 summer resident. Builds in hollow stubs and Woodpecker holes. 



90. Tachycineta thalassina. Violet-green Swallow. — Very com- 

 mon migrant. A few stay to breed, nesting in colonies in hollow stubs. 



91. Ampelis cedrorum. Cedar Waxwing. — Common throughout 

 the summer. 



92. Vireo gilvus. Warbling Vireo. — Common summer resident. 

 Frequents deciduous trees, and is often seen darting out after passing 

 insects. Very restless, and sings almost constantly. 



93. Vireo solitarius cassini. Cassin's Vireo. — Summer resident; 

 more common than the preceding. Frequents the coniferous growth, but 

 is often found in the alders and aspens. 



In variety and richness of notes Cassin's Vireo is not surpassed, if 

 equaled by any of our Vireos. Its clear, metallic notes ring through our 

 forests from earliest dawn until dark. Nests were found in oaks and alders. 

 Both nests and eggs resemble those of Vireo gilvus. 



94. Helminthopila celata lutescens. Lutescent Warbler. — Com- 

 mon summe"!- resident. Nests on the ground, and is very shy when in the 

 vicinity of the nest. During the migrations it frequents the tops of low 

 shrubbery and the smaller trees, whence it is often seen darting out after 

 passing insects. More frequently on the ground during the breeding sea- 

 son. Its song, though short and simple, is quite pleasing, consisting of a 

 few sweet trills and ending with a rising inflection. 



95. Dendroica aestiva. Yellow Warbler. — An abundant summer 

 resident. Frequents the deciduous trees more than the following, and is 

 less on the ground. 



96. Dendroica auduboni. Audubon's Warbler. — Very common 

 migrant; a few breed in the more elevated parts of the county. The 

 Audubon is the first Warbler to arrive here in the spring, and is first seen 

 about March i, usually coming in pairs or a company of pairs. Its habits 

 are nearly identical with those of the common Yellow-rump. 



97. Dendroica townsendi. Townsend's Warbler. — Rare. One seen 

 in the spring of 18S4. 



98. Dendroica nigrescens. Black-throated Gray W\rbler. — 

 A quite common summer resident. Frequents the thick firs, seldom 

 being seen in deciduous trees until the breeding season. Of its nesting 

 habits I could learn next to nothing, although for days I followed birds 

 that I was sure were building. At this time they are quite shy and 

 retired in their habits, frequenting the younger growth of firs, and 

 thickets of alder and willow, so dense that one can scarcely see a rod in 

 advance. It often requires considerable patience and perseverance to 

 secure this little sylph. I have followed one for as much as half-a-mile 

 through the thickets while, like a will-o'-the-wisp, it led me on, fluttering 



