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RE: Vulture warm up



Judging from the range of responses, it honestly sounds like a behaviour worth 
actual study. I wouldn't be surprised if it is being performed, at least in a 
small part, for thermoregulatory purposes.

Jason

"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


--- On Wed, 5/6/09, The Oberman's <kggkoberman@comcast.net> wrote:

> From: The Oberman's <kggkoberman@comcast.net>
> Subject: RE: Vulture warm up
> To: jrccea@bellsouth.net, quailspg@frii.com
> Cc: dinosaur@usc.edu
> Date: Wednesday, May 6, 2009, 7:16 PM
> Here on the East Coast (Southern Maryland), the neighborhood
> (yes, there is
> a whole "venue" of them) vultures sit on top of
> homes and spread there wings
> in the morning sun in order to help dry the dew off that
> has collected on
> them overnight.
> I don't think it's to regulate their body
> temperature.
> 
> Kevin
> 
> -----Original Message-----
> From: owner-DINOSAUR@usc.edu
> [mailto:owner-DINOSAUR@usc.edu] On Behalf Of
> jrc
> Sent: Wednesday, May 06, 2009 6:15 PM
> To: quailspg@frii.com
> Cc: dinosaur@usc.edu
> Subject: Re: Vulture warm up
> 
> No, I don't think we can make that assumption --
> according to the photos, 
> they are also doing it on cloudy days without much radiant
> heat input 
> available to them.  Perhaps they are doing it to cool off ?
>  After all, 
> folded wings do make pretty good insulators and can trap a
> lot of  body 
> heat.
> JimC
> ----- Original Message ----- 
> From: <quailspg@frii.com>
> To: <dinosaur@usc.edu>
> Sent: Wednesday, May 06, 2009 3:24 PM
> Subject: Vulture warm up
> 
> 
> > Listers --
> >
> > Here are some very nifty pix taken very recently by a
> friend of a friend
> > in Fort Collins, Colorado.
> >
> >
> http://picasaweb.google.com/heidemom/Vultures?authkey=Gv1sRgCNuQpdaq8qHu6wE&;
> feat=directlink
> >
> > They were taken in the morning, so can we assume the
> birds had their wings
> > spread to warm up? If this is so, what does it say
> about a vulture's
> > ability to regulate its body temp? (I don't think
> many other types of
> > birds engage in this behavior.) Does this behavior
> (the urge -- or need --
> > to warm up in the sun) say anything about your typical
> Mesozoic theropod?
> > Or are vultures a special case due to their scavenging
> habits (especially
> > low metabolism, maybe???)?
> >
> > -- Donna Braginetz
> >
> >
> >
> >