Charles Darwin is famous for his work on natural selection with finches, but he also worked with the Floreana mockingbird, collecting several specimens. Now, unfortunately, the Floreana mockingbird is endangered and extinct on the island of Floreana, surviving only on two tiny islands nearby.
A study of this mockingbird, however, reveals hope for the future. It seems that the populations on the two small islands retain much genetic diversity. Moreover, it seems that the two populations on the small islands have only been separated since the main island's population went extinct, using Darwin's samples.
http://news.bbc.co.uk/2/hi/science/nature/8364778.stm
-Brown Rhino
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