Peter and Rosemary Grant have been studying evolution in the Galapagos finches since 1973. This essay about their work describes their potential observation of a new species of finch, or at the very least a new variant, forming.
http://www.nytimes.com/2014/08/05/science/in-darwins-footsteps.html?ref=science&_r=0
http://www.nytimes.com/2014/08/05/science/in-darwins-footsteps.html?ref=science&_r=0
