For example, the cactus finch has a long beak that reaches into blossoms, the ground finch has a short beak adapted for eating seeds buried ... had documented natural selection in action.

However, the strong natural selection occurring in each habitat means that even though a hybrid seed can land on a dune or in the desert, it won’t ever establish in the soil. It hasn’t landed in the ...

Biologists combed through 28 years' worth of data on Magellanic penguins to search for signs that natural selection -- one ... 20 years cataloguing traits in seed-eating finches on the Galapagos ...