🚀 go-pugleaf

As an evolutionary biologist I had to take a crack at
this one.  As I see the issues there are two questions:
(1) Did the birds on these particular 2 islands evolve?
(2) What is the likelihood of evolution of populations on
    newly colonized islands?

In answer to the first question, you have a sample of virtually
the entire adult population.  Therefore you can use comparisions
which correct for finite population size and say with great
certainty whether the populations have diverged.  (Whether
this has occurred due to selection, drift, etc. is a separate
issue.)

In answer to the second question, you have a sample size of
2 from a potentially infinite population.  Thus, all that
can be done is to indicate whether the data are congruent
with theory without any statistical test.

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* Samuel M. Scheiner                 +                            *
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