ysmad Image: Owl facial disc
Description, tags: Owl facial disc -- This is one of the most amazing things I learned about birds at the "Center for birds of prey": Birds can kind of control their hearing with the hairs around their eyes. Lacking better explanation, here is a snippet from Wikipedia: "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." -- [This picture was taken at a birds of prey facility - http://www.thecenterforbirdsofprey.org/]
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