Next time an angel taps your shoulder be sure to ask him/her/them how the finches got to Galapagos, so you can bring us some information relevant to this thread.
I didn't ask angels, but I asked God and he simply replied that I took finches there, there's food for them and they want to be there. Birds can fly.
Edit: On another occasion I asked why the finches are different on each island and He replied I made them different. Then natural selection decides which succeed. Diversity is prerequisite how life can go on.
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