Taxon sampling for genetic and genomic analyses
We analyzed 30 specimens of T. ruficapillus from 18 collection
sites covering the main distribution range of the species and including
representatives of the five subspecies that have been described to date
(Figure 1a, see also Table S1 in the Supporting information Appendix).
We also included one specimen of T. doliatus and one specimen ofT. caerulescens to be used as outgroups (we could not includeT. torquatus , which is the sister species of T.
ruficapillus ; Brumfield and Edwards 2007). Subspecies were determined
according to the distribution range described by del Hoyo et al. (2020)
and Clements et al. (2022).