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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.
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Choiniere, Jonah N.; Neenan, James M.; Schmitz, Lars; Ford, David P.; Chapelle, Kimberley E. J.; Balanoff, Amy M.; Sipla, Justin S.; Georgi, Justin A.; Walsh, Stig A.; Norell, Mark A.; Xu, Xing; Clark, James M.; Benson, Roger B. J. (2021-05-07).
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refers to feathers around the neck that are raised in response to noise, essentially enlarging the facial disc and improving hearing.
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has the most visually prominent facial disc, measuring about 110 mm (Simmons), while the
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A concave collection of feathers surrounding the eyes of some birds, most notably owls
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245:. European Journal of Morphology, Vol. 40, No. 1, pp. 15–21
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Understanding Owls: Biology, Management, Breeding, Training
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Morphometry of
Auricular Feathers of Barn Owls (Tyto alba)
229:Harriers of the World: Their Behaviour and Ecology
108:anatomy with barn owls, it is theorized that the
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231:. Oxford University Press, pp. 53–56.
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217:. David & Charles, p. 20.
101:has the largest disc of any bird.
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117:may also have had a facial disc.
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241:U.R. Koch, H. Wagner (2002).
54:is the concave collection of
82:Other bird species, such as
213:Jemima Parry-Jones (2001).
70:of the facial disc forms a
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58:on the face of some
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88:facial ruff
76:sound waves
52:facial disc
48:ornithology
18:Facial disk
253:Categories
201:2024-05-16
121:References
169:0036-8075
114:Mononykus
106:inner ear
68:concavity
40:Tyto alba
177:33958472
95:barn owl
84:harriers
56:feathers
36:barn owl
149:Bibcode
141:Science
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60:birds
264:Owls
233:ISBN
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