Inhabits boreal forests, mixed forests, muskeg bogs, birches and streamside willows, including young and mature spruce and sometimes balsam fir. In northern Alaska, occurs in a variety of forests, including spruce, mixed spruce, alder, and willow (Gabrielson and Lincoln 1959, Irving 1960).
AOU. 1983. Check-list of North American birds. 6th ed.American Ornithologists’ Union, Washington D. C.
Bondrup-Nielson, S. 1984. Vocalization of the Boreal Owl, Aegolius funereus richardsoni, in North America. Canadian Field-Naturalist 98:191-197.
Hayward, G. D. and P. H. Hayward. 1993. Boreal Owl (Aegolius funereus). In The Birds of North America, Vol. 7, No.63 (A. Poole and F. Gill, Eds.). Philadelphia: The Academy of Natural Sciences; Washington, D.C.: The American Ornithologists’ Union.
Meehan, R. H. and R. J. Ritchie. 1982. Habitat requirements of Boreal and Hawk Owls in interior Alaska. Pp. 188-196 in Raptor management and biology in Alaska and western Canada: Symposium and workshop, February 17-20, 1981, Anchorage, AK (W. N. Ladd, and P. F. Schempf, eds.). Anchorage, AK.
Koprimaki, E. 1988a. Effects of territory quality on occupancy, breeding performance and breeding dispersal in Tengmalm’s Owl. Journal of Animal Ecology 57: 97-108.