
On a desert island in the heart of the Galapagos archipelago, where Darwin received his first inklings of the theory of evolution, two scientists, Peter and Rosemary Grant, have spent twenty years proving that Darwin did not know the strength of his own theory. For among the finches of Daphne Major, natural selection is neither rare nor slow: it is taking place by the hour, and we can watch. In this dramatic story of groundbreaking scientific research, Jonathan Weiner follows these scientists as they watch Darwin's finches and come up with a new understanding of life itself. The Beak of the Finch is an elegantly written and compelling masterpiece of theory and explication in the tradition of Stephen Jay Gould. With a new preface.
"The Beak of the Finch" shifted my perspective on evolutionary timeframes.
"The Design and Evolution of C++" had an inverse impact on my appreciation of academic programming language design.
This is artificial selection. When it occurs naturally, it's called Natural selection & it's the basis of evolution. The mechanism of both artificial and natural selection is the same -- increase of a trait in the population by selecting only animals with that trait to reproduce. Speciation is merely a result of this process.
Btw the pulitzer winning book "The beak of the finch" discusses how evolution actually doesn't need many generations to happen. What it needs is selection pressure -- events (such as severe draught) that force natural selection to happen within a handful of generations. It's a fascinating book on a fascinating study.
Until there was a severe drought, when that type of beak was able to take advantage of a neglected source of foods, which wasn´t accessible to the other Finches - who were more sucessful, but only when there was abundant easy food. After the resultant die-off this particular Finch subtype dominated of course.
A lot of the discussion of evolutionary traits implicitly assumes an adaption to an unchanging environment, but that is very unlikely to be the actual situation, especially as in adapting, the adaption itself can change the larger environment.
Evolution is interesting but up and down from this level of the tree of life too. I also loved reading "The Beak of the Finch" to learn about evolution in macroscopic metazoans.