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  1. Copilot 答案
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    The Great Horned Owl produces a variety of vocalizations, including:
    • Hoots: A series of four to five hoots that sound like “Hoo-hoo hooooo hoo-hoo”.
      hummingbirdsplus.org
    • Duet calls: When a pair of Great Horned Owls calls in a duet, the female usually hoots first, and the male replies at a lower pitch.
      audubon.org
    • Other sounds: Besides hoots, they also make chitters, squawks, hisses, and bill clacking.
      internationalowlcenter.org
    3 来源
    Identifying Great Horned Owl Calls, Hoots, and ... - Nature Blog Network
    Learn how to identify the different types of vocalizations made by Great Horned Owls, including hooting, screeching, begging, and more. Listen to audio clips and watch videos to ap…
    Hummingbirds Plus
    https://www.hummingbirdsplus.org/nature-blog-network/identifying-great-horned-owl-calls-hoots-and-sounds-with-audio-clips/
    Can You Recognize the Call of a Great Horned Owl? | Audubon
    Learn how to recognize the hoots, shrieks, barks, and other sounds of Great Horned Owls, the largest and most widespread owls in North America. Listen to examples of their vocaliza…
    Audubon
    https://www.audubon.org/news/can-you-recognize-call-great-horned-owl
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    Great Horned Owl Vocalizations - International Owl Center
    Learn about the different types of hoots, chitters, squawks, and non-vocal sounds that Great Horned Owls make. Listen to recordings of their vocal repertoire and see examples of be…
    International Owl Center
    https://www.internationalowlcenter.org/ghovocalizations.html
    hummingbirdsplus.org
    audubon.org
    internationalowlcenter.org