Sundaland's east–west rain forest population structure: variable manifestations in four polytypic bird species examined using RAD ‐Seq and plumage analyses

Aim A current model of rain forest population diversification in Sundaland specifies east–west vicariance into refugia during the early Pleistocene. In some taxa, this division was followed by dispersal and apparent secondary contact on Borneo in the late Pleistocene. To investigate genetic, morphological, spatial and temporal characteristics of the model, we compared genomic population and plumage variation among four bird species with...