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Re: The Evolutionary Mosaic (wasTrees Down or Ground Up?)
Luis Rey wrote:
Isn't the mosaic puzzle in turn a clear picture of evolution at work?
Following ground up reaching the tree heights or high canopy gliding from
tree to tree strategies we are seeing a 'free-for all' set of strategies in
animals that wereJust what I think. I guess Mesozoic avian evolution was very messy with mass
convergism,reversals and things unlike anything found in modern birds.The
common ancestor must have been a very primitive creature wich descendants
evolved in numerous ways,mostly getting more and more specialised for
flight,but nearly as often evolving into something else.
and whatever else might belong here..)
not absolutely specialized to what we call now sophisticated flight 'yet'.
At least some of them.
Just as sifakas... arboreal but not flyers. Whatever adaptation that helps
you to survive stays. And also as sifakas: I think there would be NO fully
formed feathers if (I'd say all) more primitive dinosaurs were not already
a precursor of feathers that served as insulatory integument. Hats off to
None of these animals were compelled to become modern birds. But some of
these animals were already getting fine tuned for extreme sophisticated
flight adaptations and an absolute dependency on those... and these were
to become the
birds we know today, the rest went extinct.
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