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- Facial_disc abstract "In ornithology, the facial disc is the concave collection of feathers on the face of some birds—most notably owls—surrounding the eyes. The concavity of the facial disc forms a circular paraboloid that collects sound waves and directs those waves towards the owl's ears. The feathers making up this disc can be adjusted by the bird to alter the focal length of this sound collector, enabling the bird to focus at different distances and allowing it to locate prey by sound alone under snow, grass, and plant cover.Other bird species, such as harriers, have less prominent facial discs. In harriers, the related term facial ruff refers to feathers around the neck that are raised in response to noise, essentially enlarging the facial disc and improving hearing.The barn owl has the most visually prominent facial disc, measuring about 110 mm (Simmons), while the great grey owl has the largest disc of any bird.".
- Facial_disc thumbnail Australasian-Harrier-Makara-Beach.jpg?width=300.
- Facial_disc wikiPageID "21001393".
- Facial_disc wikiPageLength "1554".
- Facial_disc wikiPageOutDegree "13".
- Facial_disc wikiPageRevisionID "677242782".
- Facial_disc wikiPageWikiLink Barn_owl.
- Facial_disc wikiPageWikiLink Bird.
- Facial_disc wikiPageWikiLink Category:Bird_anatomy.
- Facial_disc wikiPageWikiLink Category:Owls.
- Facial_disc wikiPageWikiLink Feather.
- Facial_disc wikiPageWikiLink Great_grey_owl.
- Facial_disc wikiPageWikiLink Harrier_(bird).
- Facial_disc wikiPageWikiLink Ornithology.
- Facial_disc wikiPageWikiLink Owl.
- Facial_disc wikiPageWikiLink Paraboloid.
- Facial_disc wikiPageWikiLink Sound.
- Facial_disc wikiPageWikiLink Sound_wave.
- Facial_disc wikiPageWikiLink Wikt:concave.
- Facial_disc wikiPageWikiLink File:Australasian-Harrier-Makara-Beach.jpg.
- Facial_disc wikiPageWikiLinkText "Facial disc".
- Facial_disc wikiPageWikiLinkText "face discs".
- Facial_disc wikiPageWikiLinkText "facial disc".
- Facial_disc hasPhotoCollection Facial_disc.
- Facial_disc subject Category:Bird_anatomy.
- Facial_disc subject Category:Owls.
- Facial_disc hypernym Collection.
- Facial_disc type Book.
- Facial_disc comment "In ornithology, the facial disc is the concave collection of feathers on the face of some birds—most notably owls—surrounding the eyes. The concavity of the facial disc forms a circular paraboloid that collects sound waves and directs those waves towards the owl's ears.".
- Facial_disc label "Facial disc".
- Facial_disc sameAs Тваравы_дыск.
- Facial_disc sameAs মুখগোলক.
- Facial_disc sameAs Gesichtsschleier_(Vogel).
- Facial_disc sameAs פרצוף-שמע_(עופות_דורסים).
- Facial_disc sameAs Sluier_(uil).
- Facial_disc sameAs Szlara.
- Facial_disc sameAs m.05b3dzh.
- Facial_disc sameAs Лицевой_диск.
- Facial_disc sameAs Лицевий_диск.
- Facial_disc sameAs Q963324.
- Facial_disc sameAs Q963324.
- Facial_disc wasDerivedFrom Facial_disc?oldid=677242782.
- Facial_disc depiction Australasian-Harrier-Makara-Beach.jpg.
- Facial_disc isPrimaryTopicOf Facial_disc.