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Re: How did dromaeosaurs use their arms?

Are you suggesting dinosaurs were unable to turn until the development
of feathers? 
Are you suggesting that there were few successful dinosaur predators
until they developed feathers?

Dinosaurs use their tail at every stride.  They can't do anything else
BUT waggle their tail when they walk.  The tail would HAVE to be
involved in turning simply because the tail POWERS the turn.

-Betty Cunningham

Matthew Bonnan wrote:
  Feathers on the arms, as well as a long, stiff tail, may have
> allowed a terrestrial predator with less mobility in its hips to compensate
> for this by incorporating the forelimbs and tail in turning, etc.  

Flying Goat Graphics
(Society of Vertebrate Paleontology member)