Song: The common call is a deep rhythmic 4 part hooting "whup, hoo-hoo, hoooo". More monotone, higher-pitched and with longer pauses between hoots than Barred Owl's "who cooks" call. Rasping whistles and screeches made by family groups, juvenile calls are rougher than adults.
Sound: John Neville
(Bird Songs of Canada's West Coast); Canada, British Columbia; Pemberton; Adult; Primary Sound;