Additional file 2: Fig. S1. of The absence of reproductive isolation between non-sister and deeply diverged mitochondrial lineages of the black-throated tit (Aegithalos concinnus) revealed by a multilocus genetic analysis in a contact zone Chuanyin Dai Yan Hao Yong He Fumin Lei 10.6084/m9.figshare.5726572.v1 https://springernature.figshare.com/articles/journal_contribution/Additional_file_2_Fig_S1_of_The_absence_of_reproductive_isolation_between_non-sister_and_deeply_diverged_mitochondrial_lineages_of_the_black-throated_tit_Aegithalos_concinnus_revealed_by_a_multilocus_genetic_analysis_in_a_contact_zone/5726572 Plots of the best K identified by the method of ΔK. (DOCX 163 kb) 2017-12-20 05:00:00 Black-throated tit Speciation in reverse Divergence time Reproductive isolation Male-biased dispersal