Geographic structuring of genetic variation differs across two contact zones in the Diglossa carbonaria superspecies
Using RADSeq data, this study reveals that while the Andean *Diglossa carbonaria* superspecies exhibits striking plumage differences, its genetic structure is characterized by weak differentiation between some taxa, evidence of introgressive hybridization in one contact zone, and a significant genetic break within a single subspecies, suggesting that plumage color is a poor indicator of phylogenetic divergence in this rapidly radiating group.