Darwin's mocking birds

Galapagos mocking birds, the first major source of inspiration for Darwin's theory of evolution, we can say that the way of creation.

Charles Darwin H. M. S. World voyage aboard the Beagle , which changed the history of humanity not only their own lives . Lasted for close to five years , and thought that the theory of evolution devriâlemine sown the seeds , " [ I ] had the feeling that I owe my head all the time the first real practice or education ," he wrote to Darwin after years . In his book The Origin of Species, published 23 years after his return journey , ie, " the new one works as well as a new philosophy of science " would create .

Without a doubt the most remembered part of the Beagle voyage that left their mark between 15 September to 20 October 1835 to visit the Galapagos Archipelago . Many large and small , each consisting of one or more of the volcano , where the Equator line, then having two different seasons , droughts and extreme precipitation events that occur at irregular intervals on the strong environmental pressures caused by living organisms , the islands played an important role at the birth of the science of evolution . Darwin , " the source of all views could be said that" we talk about Galapagoslar'dan ...

Darwin's Galapagos stay lasted only five weeks , but allowed us to make four separate views by pressing foot on the island . The islands , they host turtles, lizards, birds , plants and other creatures attracted the attention of the young navigator , as well as geological structures . Darwin , evolutionary thought in mind owed ??germination was observed in these islands faced by many living things , of course , but they develop theories of observe a wild bird in its natural habitat in accordance with the group played an important role fantastically . However, as often thought , they were not birds of Darwin's famous finches , they kuşlardı sarcastic ! Darwin , when the discovery of fauna Galapagoslar'ın acquired three separate samples mocking bird species [ Today, we know that there are actually four different species (1)] . They are on the island of San Cristóbal Mimusmelatonis (M. melatonis ) , Floreana Island, M. trifasciatus and Isabelaile M. Santiago Islands parvulus breeds ( the names of the islands at that time was different, the names used today ) .

Darwin's source of inspiration
Note the following important not later fall in the history of biological evolution : Darwin finches birds that contrary observed significant differences between the different islands, mocking birds , it may be specific to a particular candidate varieties notebook scored. (2 ) For example, the discovery of the island of Floreana mockingbird is the first, the second island suffered mocking bird on the island of San Cristóbal that supply significant differences identified and carefully notes the effect that henceforth collect the birds had added a comment . Differences ranging from island to island, not just for the birds to be convinced that the time is also valid for other living groups . Towards the end of the journey the following sentences , written in the notebook of the species may not be constant , but may change over time shows that the idea began to settle in one's mind slowly , "... Located within the line of sight of each other , with little animals , which are small structural differences in the nature of the islands inhabited by birds that occupy the same place when I saw these creatures, I guess they were just kind of a break ( ... ) If the basis of the least of these ideas If you examine the geology of the archipelago will be working with a remarkable , because the radical view of these facts undermine the stability of species . "

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