A ('Strix occidentalis caurina').
Source: US Fish and Wildlife Service http://digitalmedia.fws.gov/cdm/singleitem/collection/natdiglib/id/2222 http://www.flickr.com/photos/usfsregion5/3699675982/. http://en.wiktionary.org/wiki/File:Northern_Spotted_Owl.USFWS-thumb.jpg
Author: Hollingsworth, John and Karen; photo by USFS Region 5 (Pacific Southwest)