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Re: secondary flightlessness (wordy)
>An odd thought I had while looking at Caudipteryx (or pictures of it,
>a number of birds (eg grouse, cranes) use wing-assisted upward leaps of the
>type Tom is talking about as part of their displays. I think it is reasonable
>to assume Caudipteryx used that remarkable tail fan in some sort of
>wonder if it is fair to speculate that the arm-feathers may have assisted
>display by allowing airborne, flap-assisted leaps - or to jump even further
>and note that if so, display might have been a driving factor in the evolution
>powered flight (a mechanism I have not seen anyone suggest for the "ground-up"
>hypothesis). Of course none of this can be proved.......
An interesting hypothesis...possible a LEK system of some sort. However, using
the correct analysis you could at least determine if it were possible.