Re: dinos and birds

["James R. Cunningham" <jrccea@bellsouth.net>]

Stephen Moore wrote:

> Since
> now the consensus is that the pterosaurs were furry,
> warm blooded, highly active and robust
> animals(contrary to opinions when I was a child of the
> fragile pterosaurs, barely able to glide from tree to
> tree) why did they not survive like the birds?

Possibly because pterosaurs were primarily motor-gliders, quite
dependent upon soaring for most of their power supply while flying --
and after the Chixulub (sp??) impact, it appears that there may have
been a period where atmospheric conditions were unsuitable for soaring.