 The red warbler forms a superspecies with the pink @-@ headed warbler of Chiapas and Guatemala , to which it is closely related . Despite their disjunct ranges and considerably different plumages , the two have sometimes been considered conspecific . Conversely , it has also been suggested that the red warbler should be split into a northern gray @-@ eared species ( C. melanauris ) and a southern white @-@ eared species ( C. ruber ) . 
