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Re: More on Argentavis
As one more quick aside, I did raise an eyebrow at this interview
"Heavier birds such as the ostrich had to give up flight."
Granted, ostriches appear to be well above the maximum mass for a
volant bird (though not the limit for volant vertebrates as a whole,
see pterosaurs...), but many ratites are not. Am I mistaken in saying
that the evidence suggests an increase to ostrich size *after* loss of
volancy, rather than a loss of flight in the specific lineage leading
to ostriches as size reached maximum launch limits?