Tyto alba pratincola (Bonaparte). Barn Owl. Uncommon resident. One specimen in the University of Idaho collection of mounted birds was taken near Moscow, Latah County.
Otus asio (Linnaeus). Screech Owl. Common resident.
a. macfarlanei (Brewster). MacFarlane Screech Owl. Resident in southern Idaho. (D. A. 1861, Boise, Ada County, April 11, 1942.)
b. brewsteri Ridgway. Brewster Screech Owl. Resident in northern Idaho. (D. A. 1312, Lapwai, Nezperce County, December 25, 1938.)
Otus flammeolus flammeolus (Kaup). Flammulated Screech Owl. Rare resident. Specimens have been taken in two localities. Merriam (1891:96) took one specimen on the west side of Big Wood River, "only a few miles north of Ketchum, September 22," 1890. The record from Blaine County and the one of Rust (1915:125), near Fernan Lake, September 28, 1914, are the only two positive records of this species to my knowledge.
Bubo virginianus (Gmelin). Great Horned Owl. Common resident. See A. O. U. Check-list (1931).
a. wapacuthu (Gmelin). Arctic Horned Owl. Migrant.
b. occidentalis Stone. Montana Horned Owl. Resident in central and southeastern Idaho.
c. lagophonus (Oberholser). Northwestern Horned Owl. Resident in western and northern Idaho. (D. A. 1486, 10 mi. SW Riggins, Idaho County, September 15, 1939.)
Nyctea scandiaca (Linnaeus). Snowy Owl. Casual migrant. Merrill (1897:352) stated that there was an invasion of owls of this species in the winter of 1896-'97, and many were observed during that time at Fort Sherman.