What did Darwin wonder about the finches and tortoises?

Charles Darwin reached the Galapagos Islands in 1835. He observed many finches, tortoises and many other animals. He observed that the animals in the Galapagos were different than the animals in other places like south America.

This may be because the climate is different in the Galapagos than in other places so the animals may have involved to suit the temperatures in the Galapagos.