What observations did Darwin make during his time on the Galapagos Islands?

Question

What observations did Darwin make during his time on the Galapagos Islands?

What did Darwin infer about how things may have evolved from his observations of life on the Galapagos Islands?

Answer 1

I agree with the guy above. Darwin did years of research. It took him 20 years to write his book. But short answer to that....
(pardon me if I get it wrong)

He observed many animals, the most famous of which were the finches. He saw that the finches had a variety of beaks, from large to small to long to short, and that each beak seemed to be specialized to eat a certain type of nut. Say in one generation there were 10 large, 10 medium, and 10 small beaked birds. Then there was a drought/storm or something that prevented some of the trees from producing small nuts, but the large nuts with hard shells survived. Then, those birds that couldn't eat the nuts died out. So the next generation had 15 large, 10 medium, but only 2 small.

What happened there was the beginning of evolution. Evolution is the change in the frequency of alleles in a population from one generation to the next.

Answer 2

Your asking for more information than can possibly be given in this forum. The best way to find your answer is to read Darwin's own words. You can read all his manuscripts of " The Zoology of the Voyage of H.M.S. Beagle" for free at Darwin Online.