Data was collected concerning Galapagos bird beak size over time. There are several species finches, and they are also known as Darwin's Finches. These finches share the same habits and characteristics except for one; they all have different shaped and sized beaks. The differences in their beaks might be the most important aspect of their survival Around 1977, there was a huge drop in finches vwith small beaks while there was a great increase in large-beaked birds. How can you explain this?