What did Charles Darwin observe on the Galapagos Islands?

Answer 1

different finch populations that appeared closely related

Charles Darwin, while on the Galapagos Islands, studied finches and their beak structure as their ability to eat fruits, nuts and bugs.

Answer 2

There were iguanas that would shrink in the winter and grow in the summer there. He also studied the different types of finches.

click here for a picture of Darwin's Finches:

http://lhs2.lps.org/staff/sputnam/Biology/U6Evolution/finches.png

Answer 3

Charles Darwin observed unique species of plants and animals on the Galapagos Islands that had adapted to their specific environments, leading to the development of his theory of evolution through natural selection. He noted differences in similar species living on different islands, which contributed to his understanding of how species can evolve over time.