Data availability statement

Morphologic data, data on diet and stable isotope compositioin, mtDNA dataset (cytochrome b ), and genotyping files (various sets of SNPs) have been uploaded to Dryad: https://doi.org/10.5061/dryad.rbnzs7hgn. Genetic (new cytochrome b sequences) and genomic data (raw reads) were deposited to GenBank under Accession numbers OQ604627-OQ604649, and Bioproject ID xxx (under preparation), respectively.