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Key terms: beak birds species bill mandible nares upper nail tip bird's prey bone upper mandible shape gull feathers measurements courtship skull nostrils lower mandible owl most species plates nasal rostrum cere adults size and shape than those hummingbird vary falcon bony trimmed thin merganser juvenile dimorphism huia goose bare proximal sharp diving upper and lower petrels feeding bristles forehead these species gannet anatomy parrots epidermis raptors serrations some species septum Search external links cited by footnotes on Wikipedia page Beak: |
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