Michelle L. Crozier, Mark E. Seamans, R. J. GutiÉRrez, Peter J. Loschl, Robert B. Horn, Stan G. Sovern, Eric D. Forsman
The Condor 108 (4), 760-769, (1 November 2006) https://doi.org/10.1650/0010-5422(2006)108[760:DTPOBO]2.0.CO;2
KEYWORDS: Barred Owl, behavior, crossover experiment, interspecific competition, Spotted Owl, vocalization