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obelus    
n. 短剑号,疑问记号

短剑号,疑问记号


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  • The Silent Flight of Owls, Explained | Audubon
    Even large owls, like Barred and Barn Owls, manage to fly nearly silently through the trees How do they pull it off—and why? Barred Owl flight is described as "light, buoyant, and noiseless" as they fly between trees—or hover for 20 seconds to pounce on mousy prey Photo: Sandra Rothenberg Audubon Photography Awards
  • How Can Owls Fly Silently? - HowStuffWorks
    Owls have broad wings with large surface areas that help them to float through the air without flapping too much Less flapping makes less noise The main reason owls can fly silently is the uniquely designed leading edges of their primary feathers
  • The Hidden Secret: Why Are Owls So Stealthily Silent?
    Owls’ remarkable ability to fly silently stems from several key adaptations Here are six essential aspects that contribute to their quiet flight: Feather structure: Owls’ flight feathers have a soft, velvety texture due to a downy layer and lack of stiff barbs, disrupting airflow and minimizing noise
  • Why Are Owls So Quiet? The Secrets Behind Their Silent Flight Explained
    Owls are incredibly quiet in flight thanks to their unique wing structure and specialized feather adaptations Their large wings and low flight speed help maintain stealth Comb-like serrations on their wing edges reduce noise by breaking turbulence into micro-turbulences
  • The Silent Flight Mystery: Why Are Owls Quiet When Flying?
    The primary feathers at the tips of an owl’s wings are especially long, enabling the bird to generate more lift while gliding silently This reduces the need for excessive flapping, which would create noise
  • Owls and Their Silent Flight: Unraveling the Mystery of Noiseless Wings . . .
    Owls are able to fly silently thanks to their unique wings, which are specially designed to minimize noise This remarkable trait has captured the attention of researchers for years, and the mystery of how owls achieve silent flight is still being unraveled today
  • The silence of the owls - Knowable Magazine
    Research suggests that owl wings have three features that contribute to their silent flight: a “comb” structure (just visible at the wing’s top right), ragged trailing edges (visible along the bottom of the wing) and a velvety material that covers much of the upper left of the wing
  • The silent flight of owls is one of nature’s great mysteries
    Recent studies have linked silent flight to micro-fringes found in owl wings These trailing-edge (TE) fringes are key in reducing noise from air movement caused by wing flapping Understanding these fringes better could pave the way for quieter fluid machinery
  • How Do Owls Fly Silently? The Science of Silent Soaring!
    Owls’ feathers have a specialized structure that helps dampen sound and reduce turbulence as they fly Their flight feathers have fringed edges which help break up sound waves as they pass over them, preventing noise from being created
  • The Silent Flyers of the Night – How Owls Achieve Their Whisper-Quiet . . .
    This shadow belongs to an owl, a masterful predator whose ability to fly without making a sound has puzzled and fascinated scientists and nature enthusiasts alike But how does the owl achieve this remarkable feat? What special adaptations allow it to fly so quietly that even the most vigilant prey seldom hear it coming?





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