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Re: Marsupial forelimbs... or rather hindlimbs



On 11/26/07, Dann Pigdon <dannj@alphalink.com.au> wrote:
>
> Also; perhaps live young have an advantage over eggs in some circumstances?
> Most birds have specific requirements for nesting sites, whereas viviparous
> bats can breed just about anywhere there is a surface for their young to
> cling to.

Come to think of it, avians are basally ground nesters -- when did
tree-nesting begin? (And which clade is it limited to?)

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