Elliott Coues was an American army surgeon, historian, ornithologist and author.
Elliott Ladd Coues was born in Portsmouth, New Hampshire to Samuel Elliott Coues and Charlotte Haven Ladd Coues. He graduated at Columbian University, Washington, D.C., in 1861, and at the Medical school of that institution in 1863. He served as a medical cadet in Washington in 18621863, and in 1864 was appointed assistantsurgeon in the regular army. In 1872 he published his Key to North American Birds, which, revised and rewritten in 1884 and 1901, did much to promote the systematic study of ornithology in America. He was a founding member of the American Ornithologists Union in 1883. His work was instrumental in establishing the currently accepted standards of trinomial nomenclature the taxonomic classification of subspecies in ornithology, and ultimately the whole of zoology. In 18731876 Coues was attached as surgeon and naturalist to the United States Northern Boundary Commission, and in 18761880 was secretary and naturalist to the United States Geological and Geographical Surve
Source: Wikipedia