Vocal Array: Re: [EBB Sightings] Great Horned Owl

According to the online subcription Birds of N. Am., here's what the author's account says:

Vocal array
Although on occasion exhibits ?an indescribable assemblage of hoots, chuckles, screeches and squawks, given so rapidly and disconnectedly that the effect is both startling and amusing? (Baumgartner 1938: 274), most adults give monotonous hoots and also barks, a variation of wac-wac, when disturbed. Female vocalizations are higher in pitch because of smaller syrinx in the larger sex (Miller 1934). Makes sounds when stressed, angry, disturbed, for territorial advertisement, for mating, and as threats (DGS).




Daniel Edelstein

Ellison Bay, WI

&

Novato, CA (Bay Area)


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