Birds

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

More Questions from Birds
What are soft webbed feathers on the side of the bird's head?
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What is the bottom side of the wing on a bird called?
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What is the common name of the bird Polyplectron napoleonis?
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What is this flightless bird?
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What is the common name of the bird Atthis ellioti?
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The feathers of a bird are specialized versions of what animal feature?
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What is the state bird of Maryland?
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Which species best matches this description, "small songbird that sings beautiful, complex songs, often at night"?
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