During the summer of 1947 the writer was employed by the Fish and Wildlife Service to make studies on the effects of DDT on birds in northern Idaho. The present paper is based upon population studies made during those investigations, and the writer's observations and collections of birds made between June 1 and August 16 (exclusive of a three-week period in July when further DDT studies were being carried out in Wyoming). To make the annotated list as complete as possible, records were compiled by examination of three unpublished theses (Arvey, 1940; Engler, 1938; and Olson, 1942) and two published papers (Arvey, 1947; and Hand, 1941) dealing with the birds of Latah County and northern Idaho. The list also includes specimens from Idaho in the Connor Museuni at the State College of Washington. Acknowledgements are due to Lowell Adams, Fish and Wildlife Service, Missoula, Montana, for valuable assistance in the preparation of this paper and for many notes concerning the fauna of the region; John W. Aldrich, Fish and Wildlife Service, Washington, D.C., for examination of the specimens collected; G. E. Hudson, Curator, Charles R. Connor Museum, State College of Washington, Pullman, Washington, for permission to examine specimens from Idaho in that museum; and Eugene P. Odum, Department of Zoology, University of Georgia, Athens, Georgia, for suggestions regarding the preparation of this paper.
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