Fig. 4From: Genomic differentiation tracks earth-historic isolation in an Indo-Australasian archipelagic pitta (Pittidae; Aves) complexPrincipal component analysis (PCA) of the genomic variation among samples based on 2,193,399 SNPs. Only the first two components, together representing 82% of total variation, are shown. Note that mefoorana, goodfellowi and hebetior are included in novaeguineae in the main textBack to article page