RE: A four-winged Archaeopteryx?

[Tim Williams <twilliams_alpha@hotmail.com>]

Tom Holtz wrote:

> > So even if truly present, long hindlimb feathers do not necessarily 
> support the 4-winged > hypothesis. Maybe such feathers would be equally 
> useful in a ground-up hypothesis scenario: > helping steer long leaps etc.
>
> Or help steer while coming down out of the trees.

This also underscores just how artificial the old "ground-up" versus 
"trees-down" argument was when discussing the evolution of avian flight.  
Both behaviors may have been important.  They certainly weren't mutually 
exclusive.

Cheers

Tim