There is not 13 different species of finches, there are one species.
There are variations, but still one species.
There are 250 different breeds of dogs, but still dog species
finches
Finches, amomg others...
originated from a common ancestor
Geographic isolation of a common ancestral species of finches
The species of finches Darwin found were so varied because they had migrated over time to islands of different vegetation, and they adapted to better suit their new environment. Over time, the finches became so different from each other that they turned into new species.
No, evolution has created different species of finches on the Galapagos Islands. There are 15 different species that are found on the Galapagos islands.
Darwin's Finches
finches
That they were evoled from on specie of finches.
The type of speciation that occurred among the Galapagos Islands finches is called "allopatric" speciation. Allopatric comes from roots meaning "other country". The immigrant finches, and many other birds and animals, were very isolated from other populations of the same species on the individual Galapagos Islands. The finches developed into at least 13 different species of finch on the islands.
Finches, amomg others...
originated from a common ancestor
Geographic isolation of a common ancestral species of finches
The species of finches Darwin found were so varied because they had migrated over time to islands of different vegetation, and they adapted to better suit their new environment. Over time, the finches became so different from each other that they turned into new species.
The question as phrased confuses what Darwin found. He did not find one species of finch on the Galapagos Islands and different species on another set of islands. He found different species of finches on different islands within the Galapagos archipelagos. Some had larger beaks for cracking seeds and some had smaller beaks for capturing insects. Some were physically larger and others were smaller. The primary differences between the finches correlated almost perfectly with the predominant food source available to them on each individual island.
Geometric isolation of common ancestral species of finches has led to the development of 14 different species of finches in the Galapagos Island due to the concept of diversification.
Since Darwin found many species of plants he found many species of finches. Those species, just like the warbler finch, were found on the Galapagos Islands.