Observations of Notable Parental Behaviours of Northern Spotted Owls (Strix occidentalis caurina)

Jesse M. Alston, Janet E. Millard, Jessica A. Rick, Brandon W. Husby, Laurel A. Mundy


Northern Spotted Owl (Strix occidentalis caurina) is a medium-sized forest owl of conservation concern in the Pacific Northwest of North America. We report two sightings of previously unreported parental behaviour: a Northern Spotted Owl feeding avian nestlings to its young and a Northern Spotted Owl defending a fledgling against a Black Bear (Ursus americanus). Further research may be warranted on the influence of brood size and habitat quality on dietary breadth. Although Black Bears have not been previously documented as Northern Spotted Owl predators, we suggest that they should be considered potential predators of nestling and fledgling owls.


Nest predation; nest defense; diet; Northern Spotted Owl; Strix occidentalis caurina; Black Bear; Ursus americanus

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DOI: http://dx.doi.org/10.22621/cfn.v131i3.1874

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