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Peregrine Falcon profile shot

Cere of a falcon

Pigeon portrait 4861

Operculum of a pigeon

External openings in the upper part of the bill which allow them to breathe without opening their mouth [1].

Morus bassanus billing

Gannets have a slit on their gapes

Corvus corone young&gentle

Bristles on a common raven

The nostrils (external nares [NAY-reez]) of some birds such as crows, ravens, and grouse are protected by or by bristles, which may serve these birds also as organs of touch [1]. The nostrils of hawks and falcons are surrounded by a soft membrane (the cere) [1]. In pigeons and doves, each nostril is protected by a swollen opercula (sing. operculum), a cover of skin that only allows a little passage of air [1].


References

  1. ^ a b c d Terres, John K. (1980). The Audubon Society Encyclopedia of North American Birds. Alfred A. Knopf, Inc. ISBN 0394466519. 
Anatomy of an amiotic egg This article is part of Project Glossary, a All Birds project that aims to write comprehensive articles on each term related to animals.


Little Pied Cormorant This article is part of Project Anatomy, a All Birds project that aims to write comprehensive articles on each anatomical term related to birds.

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