[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: <was> RE: Big Dinosaur Print <now> unusual traces
Like everyone else, I've been puzzling over the
indication of tail traces associated with those big
sauropod tracks. A possibility is that the extremely
long and relatively unsupported distal 6-8' of
whiplash tail (if a diplodocid) would normally arc
downwards and skim the ground, even though most off
the tail would be held well up off the ground in a
horizontal position. This might especially occur if
the sauropod was tired and simply "not in the mood" to
hold up its tail. Just a thought....
Mark Hallett <firstname.lastname@example.org>
--- Ken Kinman <email@example.com> wrote:
> I wonder if those crows were trying to clean
> their feathers with the
> snow. If it was really cold, the ground frozen (so
> no dust baths), perhaps
> snow is an alternative way to clean feathers.
> Come to think of it, I think I would
> definitely prefer a snow bath to
> jumping into an almost-freezing river. Anyway, just
> speculating on what the
> birds might have been doing.
> >From: Marilyn Wegweiser <firstname.lastname@example.org>
> >Reply-To: email@example.com
> >To: firstname.lastname@example.org
> >Subject: <was> RE: Big Dinosaur Print <now> unusual
> >Date: Thu, 22 Mar 2001 10:20:20 -0500
> >At 9:01 AM -0600 3/22/01, King, Norm R wrote:
> >>-----Original Message-----
> >>From: email@example.com [mailto:firstname.lastname@example.org]
> >>Sent: Thursday, March 22, 2001 12:09 AM
> >>To: Dinosaur@usc.edu
> >>Subject: Re: Big Dinosaur Print
> >>>T. Mike Keesey wrote, concerning traces of
> dragged tails:
> >>>> Neither Rob nor I are talking of a dinosaur so
> sick or injured
> >>>>as to be unable to move. After all, that is a
> trackway along
> >>>>which the tail drag is seen. Just, perhaps, an
> injured theropod
> >>>>was involved.
> >>>It seems to me much more natural for
> paleontologists to accept that
> >>>dinosaurs exhibited different forms of walking.
> If I remember correct-
> >>>ly, horses show about five or six different gaits
> (e.g., walking,
> >>>trotting, pacing, galloping, etc.) and even us
> humans, even though
> >>>we walk 90% of the time, can also run, hop, skip,
> and (most important-
> >>>ly) tip-toe on various occasions.
> >>But how many gaits does one species of bird show?
> And what do they do
> >>injured? Do birds ever drag their tails when
> injured? I seem to remember
> >>seeing injured birds just kind of waddling along
> rather erratically.
> >I have observed three birds intentionally dragging
> their wings. They
> >were crows and it was during the winter several
> years ago. They
> >walked across the snow with the wing tips down,
> feathers spread open,
> >and the wings spread slightly away from the body.
> The gait exhibited
> >by them was somewhat erratic. The birds did not
> seem to be injured
> >and took flight immediately when approached. I have
> never seen crows
> >or any other bird do this since. I took a slide
> print of the traces
> >but I have no idea where it is right now.
> >There is always the fake the predator out "I'm an
> injured ground
> >nesting bird" to get you away from my nest, ploy as
> Get your FREE download of MSN Explorer at
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail.