Birds

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

More Questions from Birds
What is only found in male birds and consists of a colored area over the eye?
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What is the fringe of feather growth on the neck of a male bird used in courtship displays called?
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What is this common water bird called?
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What is the common name of the bird Bonasa sewerzowi?
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What is this common red bird?
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What kind of bird has an eye bigger than its brain?
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What is located between the lore, eye, auricular and the lower mandible of a bird?
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What small wingless jumping insect feeds on the blood of mammals and birds?
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