Galapagos Finches

Kira Landry

History

In 1977, a large drought affected the Galapagos Islands so, the seeds that Galapagos Finches became scarce. The Finches that had the largest and toughest beaks were able to eat the seeds that weren't part of their diet. As a result, the Galapagos Finches survived. The Galapagos Finches that had smaller beaks were unable to break the hard seeds and many died but, during 1984 and 1985, heavy rains made more small, soft seeds and less of the large, hard seeds. This time, Galapagos Finches with smaller beaks were able to eat the seeds and the Galapagos Finches with the larger beaks could not eat the smaller seeds. Therefore, the Galapagos Finches with the smaller beaks survived and reproduced.

How did Galapagos Finches become an example of Natural Selection?

Galapagos Finches became an example of natural selection by their beak shape and not being able to eat the large, hard seeds. The Galapagos Finches whose beaks could not eat the seeds adapted and reproduced to be able to eat the seeds.

Natural Selection Necessities

Future for Galapagos Finches

The future for Galapagos Finches can be different in many ways. If the Galapagos Islands have more droughts then there will be more finches with large and tough beaks. If the islands have a lot of rain then there will be more finches with small beaks. If there is a variation of rain and drought then there will be a variation of the different types of beaks on the finches.