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Re: 11th specimen of Archaeopteryx

Am 27.10.2011 09:42, schrieb Tim Williams:

 Yes, there are several lines of evidence that _Archaeopteryx_ was
 incapable of sustained, flapping flight. _Confuciusornis_ too; and
 probably _Sapeornis_ as well.

What are these, other than the apparent inability to lift the wing above horizontal?