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11th specimen of Archaeopteryx



For the record, I don't think anybody actually believes the _Mei_
specimen died while sleeping or resting normally, but rather was
probably sheltering itself against the volcanic ash cloud that buried
it. Whether or not this has any bearing on normal roosting behavior, I
don't know.

Matt

On Mon, Oct 31, 2011 at 1:32 AM, Don Ohmes <d_ohmes@yahoo.com> wrote:
> On 10/31/2011 1:10 AM, Tim Williams wrote:
>
>> I would have said roosting was related to locomotive activity, insofar
>> as the animal would be sitting, standing or perching on (or in) the
>> tree for long periods.  That means that it has to adopt a stable
>> posture while sleeping or resting.  There is no evidence in the
>> anatomies of_Archaeopteryx_  or any non-avian theropod that they were
>> capable of this.  How did they prevent themselves from toppling off a
>> limb, when the manus and pes had minimal (if any) prehensile
>> abilities?
>
> Just guessing -- none of you guys have ever so much as climbed a tree?
>
>> Further, the 'tuck-in' sleeping posture adopted by_Mei_  seems
>> incompatible with roosting.  Now, I'm not saying that all paravians
>> adopted this posture, or that those that did adopted it whenever they
>> slept or rested.  But the fact remains that Archie and non-avian
>> paravians lack any adaptations for roosting, and at least one (_Mei_)
>> was preserved in a posture that showed it rested and slept on the
>> ground.
>
> Interesting. The part about Mei, that is... I will read up later.
>
>> Besides, I still don't see how tree-climbing qualified as a refuge for
>> small paravians, when so many potential predators were large - at
>> least as large as many tall trees.
>
> LOL. I really do not think the mega-theropods were targeting crow-sized
> animals, period. Or sticking their noses into thickety places.  Even should
> that be the case -- hey, at least in a tree they would not get stepped on.
>
> Walking in the woods at night it is common to disturb roosting animals --
> they ALWAYS bail on the opposite side of the tree -- it is a very effective
> escape strategy.
>
> Good night, folks.
>