Going like the Clappers

A new genetic analysis has concluded that the North American large rallid complex of King and Clapper Rails should in fact be four distinct species, with both being split into at least two separate taxa.

Reference
Maley, J M, and Brumfield, R T. 2013. Mitochondrial and next-generation sequence data used to infer phylogenetic relationships and species limits in the Clapper/King Rail complex. Condor 115: 316-329.