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Re: Pterosaur size
----- Original Message -----
From: "don ohmes" <email@example.com>
Sent: Wednesday, December 13, 2006 11:13 AM
Subject: Re: Pterosaur size
But then you would (wager they will eclipse Quetz)? I wouldn't. Unlike Jim
and Mike, I don't think today's environment could evolve a Quetz-sized
------- Why not? Current atmoshperic conditions wouldn't stress either them
or any of their ancestral line.......
Or tomorrow's environment either.
That triggers a real big "Why not".
In fact, I think the current size limit for flapping flight is below
Argentavis, and somewhat above the largest birds living...
I tend to agree with this particular statement, but what do avian limits
have to do with pterosaurian (or bat) limits?
even considering that some systems are superior to others, which to my
mind just increases the variance, but doesn't affect the slope of the
moving average. Just an opinion.
Some of us don't see a moving average in operation.
Drosophilids optimize wingload in a few generations, in response to
Individual birds do it in a few days, in response to changes in wing area
because of the moult. Birds that lose, say 30% of their wing area during
the moult also tend to lose about 30% of their body mass (which does reduce
their efficiency, but also allows them to continue to fly without much
alteration of performance).