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THE-CO.B.R Volume X July-August 190? Number 4 SIERRA FORMS ON THE COAST OF SONOMA COUNTY, CALIFORNI A By JOSEPH MAILLIARD WITH TWO PHOTOS BY THE AUTHOR N May 11, 1908, I started with my son for a week's collecting trip to a point some 90 miles by rail and stage north of San Francisco, principally for the purpose of ascertaining which form of chickadee would be found breeding there, I expecting to find something very close to Parus rulescerts--which expectation was fully realized. During the stormy week of our stay at this place, which was on the ridge some 1400 to 1600 feet high just back of Fort Ross, Sonoma County, but two or three miles from the ocean shore, I was greatly surprised to find breeding ther? birds which one associates only with the Sierra region or the foot- hills thereof, and not at all with the coast proper. H.H. Sheldon, in TI-m Co?r)oa, Vol. X, No. 3, has described the finding of nests of the Monterey Hermit Thrush (Hylocichla g. slevin?) and Western Golden-crowned Kinglet (Regulus s. oliva- ceus) in this same locality; but in addition to these species I found Audubon War- bler (Dendroica auduboni) and the Black-throated Gray Warbler (Dendroica nigrescens) apparently breeding, and found a junco (Junco h. lhurberi ?) with nests and young. No actual nests of the two above warblers were discovered and only male birdi were taken, but from their actions and notes, and from the number of Audubon Warblers, at any rate, flitting about the higher parts of the tall Douglas spruce trees--both sexes being seen--there is but little room for doubt as to their being present for any other purposes than breeding. They certainly did not act like or have the appearance of migrants--and at this season they would of necessity be late ones if in this category--in spite of the fact that these birds are not supposed to breed on or near the ocean shore. Another surprise was the fact that the Cyanocitta of this region--which we might call the South Fork of the Gualala River to the mouth of the Russian River-- is vastly different from the Steller Jay of the more northern coast and the Coast Jay