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RE: Marsupial flight (ex forelimbs)

Mike Keesey wrote:

> Incidentally, it kind of seems that marsupial pouches would be
> *better* for a flying guild than placentalian clinging. And there are
> several lineages of gliding marsupials--it does seem odd that none of
> them have developed flight. (Although, given the rarity of amniote
> flight, especially amniote flight derived from skin-gliding, maybe
> luck has something to do with it.)

I tend to agree.  I suspect that there's a large "right place, right time" 
factor when it comes to the evolution of powered flight.  Gliding evolved 
several times independently in Rodentia, but there are no volant rodents 



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