Darwin’s Finches
Michaela Hau, University of Illinois at Urbana-Champaign, Illinois, USA
Martin Wikelski, University of Illinois at Urbana-Champaign, Illinois, USA
Darwin’s finches are a prime example of adaptive radiation and of evolution in action. Beak
size of these equatorial bird species repeatedly changed within two decades as a response
to environmental changes during El Nin˜o conditions.