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their feathers are so soft that they make virtually no noise when they fly,they have a highly developed auditory (hearing) system, adaptation of their wings is that they are very large for their lightweight body,  They have large eyes with excellent night vision and hearing to help them locate prey in the darkness.

# data[].attributes.body
Owls are generally active at night, they have a highly developed auditory (hearing) system, The "Ear Tufts" visible on some species are not ears at all, but simply display feathers.

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the comb-like or fimbriate (fringe-like) leading edge of the primary wing feathersreferred to as "flutings" or "fimbriae"fmbriae", With a normal bird in flight, air rushes over the surface of the wing, creating turbulence, which makes a gushing noise.

# data[].attributes.body
Owl's are able to hear the softest rustle of mice, vole, rat, mole, bird or insects and to locate the sound precisely, Owls don't have a sense of smell, so they can't 'sniff' out prey. Almost all of the diurnal birds of prey (eagles, hawks and so on) are the same as owls and have no sense of smell.