Table S1. Morphological sample list

Museum voucher information for all skin specimens of the varied tit (Sittiparus varius) complex examined in this study. Tissue voucher numbers are provided for the few cases in which an individual was sampled for both morphological and genetic data. Acronyms: National Museum of Nature and Science, Tokyo (NSMT); American Museum of Natural History (AMNH); Yamashina Institute of Ornithology (YIO); National Museum of Natural Science, Taiwan (NMNS), Taiwan Endemic Species Research Institute (TESRI).