Diets of the Common Screech Owl (Otus asio) and Burrowing Owl (Athene cunicularia) from the Great Basin, Malheur County, southeastern Oregon, were studied. Although there was considerable overlap in the diets of these owls, there were differences related to habitat use.
Brown, Barbara A.; Whitaker, John O.; French, Thomas W.; and Maser, Chris
"Note on food habits of the Screech Owl and the Burrowing Owl of southeastern Oregon,"
Great Basin Naturalist: Vol. 46
, Article 6.
Available at: http://scholarsarchive.byu.edu/gbn/vol46/iss3/6