what observations did charles darwin make about finches in the galápagos islands?
He also discovered everything else the Galapagos is known for, including the giant tortoise and the marine iguana. Darwin hypothesized that finches naturally have a diversity of beak size, with some birds having larger ones than others in a population. If the island these birds are on has only large nuts, then the birds with smaller beaks will die off, not being able to crack those nuts and, thus, starving.