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Re: Deinonychus Morphological Variations within Ontogeny



I wrote:

> There is also the issue of whether _Deinonychus_ (including juveniles)
> were capable of flapping at all.  This ability is dependent on the
> orientation of the shoulder joint.  Dromaeosaurids have been
> reconstructed as having a glenoid that was too ventrally oriented to
> permit elevation of the humerus above the back (Senter, 2006).  So
> _Deinonychus_ would have been limited to "passive" gliding or other
> aerial behaviors that did not entail an upstroke (including WAIR).


By which I meant: without the ability to flap, _Deinonychus_ would NOT
have been able to perform WAIR (wing -assisted incline running).