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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 wikiPageRevisionID "540518763".
- Facial_disc hasPhotoCollection Facial_disc.
- Facial_disc subject Category:Bird_anatomy.
- Facial_disc subject Category:Owls.
- Facial_disc type Animal100015388.
- Facial_disc type Bird101503061.
- Facial_disc type BirdOfPrey101604330.
- Facial_disc type Chordate101466257.
- Facial_disc type LivingThing100004258.
- Facial_disc type Object100002684.
- Facial_disc type Organism100004475.
- Facial_disc type Owl101621127.
- Facial_disc type Owls.
- Facial_disc type PhysicalEntity100001930.
- Facial_disc type Vertebrate101471682.
- Facial_disc type Whole100003553.
- 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 label "Gesichtsschleier (Vogel)".
- Facial_disc label "Sluier (uil)".
- Facial_disc label "Szlara".
- Facial_disc label "Лицевой диск".
- Facial_disc sameAs Gesichtsschleier_(Vogel).
- Facial_disc sameAs Sluier_(uil).
- Facial_disc sameAs Szlara.
- Facial_disc sameAs m.05b3dzh.
- Facial_disc sameAs Q963324.
- Facial_disc sameAs Q963324.
- Facial_disc sameAs Facial_disc.
- Facial_disc wasDerivedFrom Facial_disc?oldid=540518763.
- Facial_disc depiction Australasian-Harrier-Makara-Beach.jpg.
- Facial_disc isPrimaryTopicOf Facial_disc.