The species are so distinct that when Charles Darwin collected them in the islands he thought they were completely different birds, and it was only when he was back in London in 1837 that the ornithologist John Gould revealed that they were closely allied, reinforcing Darwin's growing view that “species are not immutable.”
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The Beak of the Finch: A Story of Evolution in Our Time (ISBN 0-679-40003-6) is a 1994 nonfiction book about evolutionary biology, written by Jonathan Weiner.
Finch | Peter Finch | Robert Finch | finch | Heneage Finch, 5th Earl of Aylesford | Andy Finch | Long-tailed Finch | Jennie Finch | Jane and Finch | Greater Koa Finch | George Finch, 9th Earl of Winchilsea | Annie Finch | Rachael Finch | Laysan Finch | Lady Charlotte Finch | Jennifer Finch | Heneage Finch, 3rd Earl of Aylesford | Greenish Yellow Finch | Flora Finch | Fleet Finch | Finch (US band) | Finch (U.S. band) | Finch College | Finch Avenue | Finch (American band) | Cassin's Finch | Beak | Yellow-bridled Finch | Roy G. Finch | Roy Finch |