Rosemary Grant, who have been documenting changes in populations of
Darwin's finches for decades.
For many people, British ornithologist David Lack's studies of finches on the Galapagos Islands, culminating in his landmark 1947 book,
Darwin's Finches, captured the essence of neo-Darwinism's metaphor of a tree with never-crossing, ever-diverging branches.
The cactus finch, one of 13 closely related
Darwin's finches unique to the Galapagos, has a specially adapted beak, sturdy enough to open a hole in the side of the tough fruit.
He intends to smash the holiest relics of evolutionary theory, the examples used in textbooks or the popular press to such a degree that they have become "icons." He attacks in turn the origin of life's building blocks, the evolutionary tree, homology of vertebrate limbs, Haeckel's embryos, origin of birds, peppered moths,
Darwin's finches, mutation, horse evolution, and apes to humans.
Examples of adaptive radiation include fruit flies (Drosophila) and honeycreepers (drepanidids) in Hawaii, iguanas (Ctenosaura) and lizards (Anolis) in the Antilles, and, of course, in tortoises (Geochelone elephantopus) (see figure 193) and in
Darwin's finches the Galapagos Islands.
A genetic study has shown that
Darwin's finches, which were cited as a textbook example of the evolutionary process, are continuing to evolve in their native Galapagos Islands, according to a U.S.
Fitness of 1987 cohorts of
Darwin's Finches (over four years).
There he found some fourteen species of finches, today called
Darwin's finches, which varied among themselves in food habits, size, and shape of bill.
Oscillating selection on
Darwin's finches. Nature 327:511-513.
This time I'll respond: My school is where I fit in, where I've evolved as an educator--kind of like
Darwin's finches or Galapagos turtles.
These include
Darwin's Finches of the Galapagos, such as the Large Ground Finch."