Fig. 3.

—Box-plots of phylogenetic distances (measured as the average number of nucleotide substitutions per site) based on the MrBayes tree between pairs of various passerine lineages and within them. The thick line indicates median, the boxes show quartile range, and the whiskers denote the range without outliers. Trans. Osc., Transitional Oscines; Corvida is considered as in Boyd (2016), that is, does not include Basal and Transitional Oscines; Muscicapoidea is considered as in the traditional classification, that is, it includes groups, which have the level of superfamily in Boyd (2016): Bombycilloidea, Certhioidea, core Muscicapoidea, and Reguloidea; Passerida is considered as in the traditional classification, that is, does not include Transitional Oscines; Sylvoidea s.l. (sensu lato) is considered as in the traditional classification, that is, it includes also Paroidea; Sylvoidea s.s. (sensu stricto) is considered as in Boyd (2016), that is, it does not include Paroidea.