THE AUK: 



A QUARTERLY JOURNAL OF 

 ORNITHOLOGY. 



Vol. XXXIII. October, 1916. No. -1. 



THE LAKE CRESCENT REGION, OLYMPIC MOUNTAINS, 



WASHINGTON, WITH NOTES REGARDING ITS 



AVIFAUNA. 



BY SAMUEL F. RATHBUN. 



Plates XIX-XXI. 



As there exists only a general knowledge of the ornithology of 

 the country in which the following observations were made, and as 

 the region is but imperfectly known, it is thought advisable to give 

 in connection with the list of species, a description of the country, 

 the forest conditions that prevail, and also some idea of the flora, 

 since these factors and the avifauna are correlative. Regarding 

 the climatic conditions, howe^'er, little can be definitely stated as 

 there are no data of an official character available, although the 

 importance of this factor is its relationship to the bird life is fully 

 recognized. 



The writer's visit to the region covered the greater part of May 

 and early October, 1915, the latter half of April and June, and 

 early July, 1916; during this period all the territory immediately 

 contiguous to the lake was thoroughly investigated, and numerous 

 trips were made along the few trails adjacent thereto, as well as 

 up the mountain sides. As a result, much knowledge was ob- 

 tained regarding the species enumerated below but we were im- 

 pressed with the fact that in a region so diversified, considerable 

 future observation is required before a definite knowledge of its 



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