Birds

What are the rounded areas on the bird’s face covered with feathers which are also called facial discs?

More Questions from Birds
What is the bottom side of the wing on a bird called?
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What is the part of the leg between the knee and the foot of the bird, similar to the lower leg in humans?
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Which species best matches this description, "type of grouse that live in North American grasslands"?
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What is the common name of the bird Hylonympha macrocerca?
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What is the common name of the bird Bubulcus ibis?
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What is the small iridescent patch on the throat of a hummingbird?
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What is the common name of the bird Heliomaster longirostris?
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What is the common name of the bird Campylopterus curvipennis?
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