Warbler Finch

Luke Bennett

Background

The warbler finch is said to have been the ancestor of a migrant finch that came from the mainland of South America to the Galapagos Islands. Charles Darwin believed that the warbler finch and the other 12 endemic finches had gained adaptations to their beak sizes to exploit their habitats and diet. The Warbler Finch eats mostly seeds so it has a smaller, sharper-shaped beak. (http://www.arkive.org/warbler-finch/certhidea-olivacea/)

Evidence of Evolution

Evidence

Fossils have been found on the Galapagos Islands of a finch unlike any of the other known species of finches on the island. This is believed by some to be the parent of all the different species on the Galapagos Islands. (http://www.creationbc.org/index.php?option=com_content&view=article&id=112&Itemid=67) The morphology of the finches is very easy to identify because of the different shapes and sizes of their beaks. The Warbler Finch is perfectly suited for its environment because it has a small beak and is gray or green in color depending on whether it lives in the grass or branches of trees. (http://en.wikipedia.org/wiki/Morphology_(biology) ) The fossil record of the Warbler Finch shows that it adapted through adaptive radiation which means they adapted over a relatively short time period. The different species of finches are spread to different areas of the Galapagos Islands to use the advantages of the shape of their beaks. (http://www.creationbc.org/index.php? option=com_content&view=article&id=112&Itemid=67)