Birds

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

More Questions from Birds
What feature makes it easier for birds to fly?
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What is the lower most ridge on the lower mandible on a bird called?
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What bird, often depicted on ancient Athenian currency, now graces the Greek 1-Euro coin?
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What is the common name of the bird Platalea minor?
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Which bird has been spotted on the slopes of Mount Everest, five miles above sea level?
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What kind of bird has an eye bigger than its brain?
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What sea bird lives in the Arctic?
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Which bird cannot fly?
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