How do you know that finches' beak depth is heritable? You can see from Figure 2 that there is a correlation between the parents' and offsprings' beak size. How did the finch population change ...

The new study shows that beak-driven changes to songs themselves can impact species recognition, and thus drive the separation of species. "I started working with these birds 25 years ago," says ...

In his memoir, The Voyage of the Beagle, Darwin noted, almost as if in awe, "One might really fancy that, from an original paucity of birds in this archipelago, one species had been taken and ...

Darwin's Finches These drab but famous little birds of the Galapagos Islands are a living case study in evolution. Isolated in the South Pacific, they have developed 14 species from a common ancestor ...

Darwin collected many animal specimens during the voyage of HMS Beagle (1831-1836). Among his best-known are the finches, of which he collected around 14 species from the Galápagos Islands. The birds ...

Darwin's drawings of the different heads and beaks of finches Darwin's observations revealed that the finches had wide variations in their size, beaks and claws depending on which island he was ...