A Darwin Finch, probably Geospiza Fuliginosa the Small Ground Finch, Puerto Ayora, Galapagos Islands.
There are 13 species of finches which are found in and only in the Galapagos island. All have evolved from the same ancestral species over the course of thousands of years. All are known as Darwin Finches and are named after Charles Darwin, the father of the theory of evolution. Mr. Darwin is the author of the groundbreaking "The Origin of Species", published in 1859. Before it's publication, it was assumed that all species were invariant through time.