[NatureNS] AND ...

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Date: Sun, 5 Apr 2009 12:57:17 -0300
From: Randy Lauff <randy.lauff@gmail.com>
To: naturens@chebucto.ns.ca
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Yup.

Noses are used for two things, well, two major things...breathing and smelling.

In general, it is thought that birds don't have a good sense of smell,
though I seem to recall some work with vultures that indicated that
their sense of smell is better than most birds.

Birds in general keep their beaks shut except when vocalizing or
feeding/drinking. Most air going to their lungs goes through their
nostrils. Now some birds like gannets have no nostrils (this is
advantageous to divers, especially plummet divers). Winter air
entering the bird for breathing must be warmed to above freezing prior
to it getting to the lungs (which are so thin and wet that they would
freeze almost instantaneously were this not to happen). In mammals,
and I presume birds, this happens in the "nose".

If you define the nose more liberally, then the beak is definitely
made up of the nose, in part. And the beak is used for feeeding,
drinking, display, defense, preening, and likely a few more tasks that
I'm just not thinking of off the top of my head.

Randy

On 05/04/2009, Annabelle Thiebaux <hamst@xplornet.com> wrote:
> DO BIRDS HAVE NOSES?
>


-- 
Randy
_________________________________
RF Lauff
Way in the boonies of
Antigonish County, NS.

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