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RE: A four-winged Archaeopteryx?
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