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EARLY ARCHOSAUR PHYSIOLOGY
> Many rauisuchians, poposaurs, and ornithosuchids also look like very
> active animals and also should be checked for bone structure.
> Nick Pharris
In their aerobic and physiological capabilities, these animals could well be
comparable to modern varanids. They're not endothermic, but are nevertheless
capable of sustained active movement. They do operate differently from other
"Ichthyornis... was a bird of very modern appearance, something like a tern, but
about 8ft (2.5 m) tall".
But of course!