Figure 3: Test of species boundaries using nuclear loci.
From: Australia’s arid-adapted butcherbirds experienced range expansions during Pleistocene glacial maxima
(a) Phased allele networks for seven nuclear loci scaled by sample size, and coloured according to the six geographic groups used as a priori taxonomic units in *BEAST. Small black circles represent inferred unsampled haplotypes, and white boxes indicate the positions of indels. (b) STRUCTURE plots depicting population assignment of 51 white-throated butcherbirds estimated under two, three, four and six putative populations (K). Each vertical bar represents the proportion of assignment of a single indivual to each population considered at that value of K. Individuals are sorted by geographic group and species—Top End (TE), Kimberley (KIM), Cape York (CYP), New Guinea (NG), eastern Grey Butcherbird (EASTERN), western Grey Butcherbird (WESTERN). (c) *BEAST multilocus species tree supporting the monophyly of the three white-throated butcherbird species. Figure reproduced with permission from Elsevier23.
