There lives in biology a great consensus truth that evaporates upon close scrutiny.
Taking the facts and arguments presented together, it appears to be clear that no macroevolution is happening in “Darwin’s finches.”
This is by no means an all-or-nothing selection (as the impression is sometimes given). Rather, the alleles are retained.
They are not, per the National Academy of Sciences, a “particularly convincing example for speciation.”
In a series of posts starting today, I offer some notes on the question of whether macroevolution is happening on the Galápagos Islands.