Birds

What is the lower most ridge on the lower mandible on a bird called?

More Questions from Birds
What animal is a large flightless Australian bird?
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Which of these is a North American raptor or bird of prey?
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What is the common name of the bird Metallura iracunda?
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What is the common name of the bird Otus scops?
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What seabird with a colorful beak is often called "sea parrot" or "clown of the sea"?
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What is the uppermost central ridge of the upper mandible on a bird called?
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What are the primary feathers on the wing farthest from the body?
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What is this common beach bird?
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