Figure S6: Cross-entropy plot used to identify hierarchical population structuring in the genomic dataset for King Island and Tasmanian scrubtits. Lower values of the cross-entropy criterion indicate a better fit to the data. The relatively large drops in cross-entropy scores between 1 and 2, 2 and 3 and (to a lesser extent) between 3 and 4 ancestral populations (k ) indicates that kvalues of 2, 3 or 4 are well-supported, although higher levels ofk further subdivide a-priori populations into clusters that correspond with the spatial pattern of sampling.