galapagos islands finches beaks

There is an interesting finch bird on Wolf Island, it is the Sharp-Beaked Ground Finch. The Vampire Finch (Geospiza difficilis septentrionalis) is a small bird native to the Galápagos Islands. It is a very distinct subspecies of the...


finch of Galapagos Islands


The different beak types found


Diagram of finches


Diagram of Finch beak size and


Darwins finches beaks natural


Beak adaptations of several of

The most popular creature living on the Galapagos Islands is the giant tortoise; some finches have evolved special beaks that are small and sharp enabling them to pick ticks from the tortoises' shells. The tortoises have...
How Charles Darwin's Theory of Evolution was Influenced Ecuador ...

Suppose you had several members of a species of bird who landed on an empty island (similar to the Galapagos islands), and there was very little selection pressure, so that after a while the island was filled with birds. For the most part, the birds look like... Suppose this happens for two or three years (via 4, selection pressure), so that a third of the birds have distinctly larger beaks than the first generation, and perhaps are physically larger than the rest. Now, suppose things change,...
galapagos islands finches beaks