OLIVE-SIDED FLYCATCHER 293 



lined with lichens and pine needles or rootlets." A nest that he meas- 

 ured was 6 inches in outside diameter and 21/2 inches in inside diameter ; 

 the outside depth was 21/3 inches and the inner depth 1 inch. This 

 seems rather large, as nests that I have measured have been 5 inches 

 or less in outside diameter; and Bendire's figures agree very closely 

 with mine. 



Robie W. Tufts tells me that nests of this species have been found 

 in spruce, fir, hemlock, apple, elm, and locust trees, but a fair estimate 

 for Nova Scotia would be 24 out orf 25 in conifers. 



The above data all refer to eastern nestings; some western nest- 

 ing sites and nests are quite different. Chester Barlow (1901) says 

 that in the Sierra Nevadas "the average heights of nests of this 

 species seems to be from 60 to 70 feet, firs being the favorite tree." 

 He mentions a nest, found by Mr. Carriger, that was 72 feet up in 

 a Douglas spruce, and one that he collected himself at about the 

 same height in a silver fir. "The nest was composed of rootlets 

 with which was mixed a quantity of bright yellow dry moss 

 (Evemia vulpina) so common in the Sierras." At the other ex- 

 treme, as to height, is a nest in the Thayer collection, taken by C. I. 

 Clay near Eureka, Calif., that was only 5 feet from the ground in 

 a redwood sapling; this nest is made of small, dry twigs, coarse 

 weed stems, mixed with a small quantity of a mosslike lichen; the 

 lining of the nest is smooth and firm, but the material is only slightly 

 finer. J. E. Patterson sent me a photograph of a nest at Buck Lake, 

 Oreg., that was on the tip of a horizontal branch of a lodgepole pine, 

 30 feet above ground. Another nest in the Thayer collection, taken 

 by F. M. Dille in Estes Park, Colo., is made of coarse and fine dead 

 twigs, weed stems, and grasses and is lined with very fine grasses 

 and rootlets, but with no moss or lichens. 



The presence of the olive-sided flycatcher in summer in the San 

 Francisco Bay region, notably in Berkeley, had been noted by a num- 

 ber of observers before Donald D. McLean and Joseph Dixon actually 

 discovered a nest there. Dixon (1920) reports that on June 12, 1920, 

 a set of four slightly incubated eggs was secured by them "from a 

 slender Monterey cypress that stands on the south-facing hillside 

 just north of the Claremont Hotel, in Berkeley." "The nest," he 

 says, "was placed fifty-seven feet above the ground, by actual meas- 

 urement, and thirty inches from the tip of a long slender upper 

 branch of a broken-topped cypress. The situation was exposed, but 

 the brooding bird was partially screened from above by an over- 

 hanging branch. The nest was firmly ensconced on top of a cluster 

 of twelve cypress cones, the main limb itself at this point being in- 

 sufficient, as it was only one-half inch in diameter. The foundation 

 of the nest consists of dead bare cypress twigs and a few dry grass 



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