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Re: nice cover painting - Re: NEW BOOK: Dinosaurs of Eastern Iberia



As elitist as this is going to sound, "mouth breathing" is a distinctly 
mammalian thing. Reptiles and birds both breathe almost entirely through the 
nose, even when they are going full out.

Jason

 
http://reptilis.net 


"I am impressed by the fact that we know less about many modern [reptile] types 
than we do of many fossil groups." - Alfred S. Romer


----- Original Message -----
> From: Mike Keesey <keesey@gmail.com>
> To: dinosaur@usc.edu
> Cc: 
> Sent: Wednesday, 19 October 2011 10:18 PM
> Subject: Re: nice cover painting - Re: NEW BOOK: Dinosaurs of Eastern Iberia
> 
> On Wed, Oct 19, 2011 at 6:47 PM, Augusto Haro <augustoharo@gmail.com> 
> wrote:
>>  Canids commonly trot with open mouths, so other animals making use of
>>  high cursing velocity and aerobic metabolism, as dinosaurs are
>>  currently considered, may behave similarly. Overall, that seems to be
>>  the case in canids when pursuing prey, moment at which oxygen uptake
>>  may increase. That in addition to panting, which may be common in
>>  active cursors.
> 
> Or, a little closer to home, phylogenetically speaking:
> http://images.letsbuyit.co.uk/original/30/40/two-male-ostriches-running-during-dispute-etosha-national-park-namibia-photographic-print-23-x-30-5744030.jpeg
> 
> (Granted, most pics of ostriches running show them with mouths closed.)
> 
> -- 
> T. Michael Keesey
> http://tmkeesey.net/
>