Congrats to Miguel! The citation:

Alcaide, M., E.S.C. Scordato, T.D. Price, and D.E. Irwin. 2014. Genomic divergence in a ring species complex. Nature 511: 83-85.  Link

Feel free to email Darren Irwin for a PDF.

The press release:
http://www.eurekalert.org/pub_releases/2014-05/uobc-rmt052214.php

To read about our earlier work on the Greenish Warbler ring species, see here.