Birds of the Northwest A Hand-book of the Ornithology of the Region Drained by the Missouri River and Its Tributaries

This volume is based mainly on an unpublished report prepared by Coues in 1862 from the ornithological collections of F.V. Hayden and G.H. Trook taken during an expedition under Captain W.F. Raynolds, United States Engineers. The author preserved the "List of Specimens" tabulated in the original report, and extended the list with additional material from other collection trips in the West to compile what amounted to a "treatise on the Ornithology of the Western Territories," a desire expressed by F.V. Hayden to Coues.