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Northern Hawk Owl - Surnia ulula

Photo: Ann Cook; Adult;
Song: The advertising call is a high-pitched tremolo, 3-5 seconds in duration, similar to the tremolo call of an Eastern Screech Owl. The alarm call is an ascending "screee-yip" of 2-3 seconds duration with emphasis on the last syllable.
Sound: John Neville (Bird Songs Western Boreal Forest); Canada, Alberta; Peace River Valley; Adult; Primary Sound;


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Number of species: 439

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