172 
THE CONDOR 
Vol. XI 
springs in the foothills. Beautifully constructed nests were found in barren gulches 
hung in wild tobacco plants not more than 5 to 8 feet high. 
Euphagus cyanocephalus. Brewer Blackbird. Common along Poso Creek. 
Carpodacus mexicanus frontalis. California Linnet. Abundant everywhere. 
Chondestes grammacus strigatus. Western Lark Sparrow. Common every- 
where; especially so along Poso Creek. 
Passerculus sandwichensis alaudinus. Western Savannah Sparrow. A few 
seen near the head of Poso Creek and two taken. 
Spizella breweri. Brewer Sparrow. Large flocks appeared in September on 
the oak-covered hills. 
Amphispiza bilineata deserticola. Desert Black-throated Sparrow. Two birds 
together near the head of Poso Creek, and one was secured. This is a record for 
the species, being the first known instance of its occurrence inside the San Joaquin 
Valley. 
Aimophila ruficeps. Rufous-crowned Sparrow. Fairly common on brushy 
hills and in canyons. Two specimens taken. 
Zamelodia melanocephala. Black-headed Grosbeak. A few seen at Poso Creek. 
Guiraca caerulea lazula. Western Blue Grosbeak. Two males seen at Poso Creek. 
Piranga ludoviciana. Western Tanager. A few seen at Poso Creek in 
September. 
Tachycineta thalassina lepida. Northern Violet-green Swallow. A flock of 
several hundred flew up the Long Tom gulch one evening and disappeared over the 
range. Two immature birds were secured. 
Lanius ludovicianus gambeli. California Shrike. Fairly abundant about the 
foothills. 
Vireosylva gilva swainsoni. Western Warbling Vireo. Seen occasionally at 
Poso Creek. 
Vermivora rubricapilla gutturalis. Calaveras Warbler. One specimen secured 
in September, when the species appeared to be abundant about springs in the 
canyons. 
Dendroica aestiva brewsteri. California Yellow Warbler. Fairly common at 
Poso Creek; occasionally seen at Long Tom. 
Dendroica nigrescens. Black-throated Gray Warbler. A few seen in the latter 
part of September and one specimen taken. 
Wilsonia pusilla chryseola. Golden Pileolated Warbler. Common along Poso 
Creek; occasionally seen around Long Tom. 
Mimus polyglottos leucopterus. Western Mockingbird. A few seen in rocky 
canyons at Long Tom. Also at Poso Creek. 
Salpinctes obsoletus. Rock Wren. Very common; nests plentifully about 
Long Tom. 
Catherpes mexicanus punctulatus. Dotted Canyon Wren. Fairly common 
along Poso Creek; tw 7 o taken. 
Sitta carolinensis aculeata. Slender-billed Nuthatch. One seen running up 
the side of our cabin at Long Tom. 
Baeolophus inornatus. Plain Titmouse. Fairly common along north side of 
Poso Range. 
Psaltriparus minimus californicus. California Bush-tit. Fairly abundant in 
the foothills. 
Polioptila caerulea obscura. Western Gnatcatcher. Very common about the 
hills and at Poso Creek. 
Sialia mexicana occidentalis. Western Bluebird. A few r small flocks seen in 
September along Poso Creek. 
San Anselmo, California. 
