Varied Tit splits

A taxonomic revision of the Varied Tit complex in eastern Asia will recommend the recognition of four species, and suggest new English names: the widely distributed Varied Tit Parus varius (including the subspecies amamii, namiyei, orii, sunsunpi and yakushimensis); Chestnut-bellied Tit P casteneoventris (Taiwan); Owston’s Tit P owstoni (southern Izu Islands); and Iriomote Tit P olivaceus (Iriomote). The decision is based on plumage, morphometric and DNA analyses.

Reference
BirdForum taxonomy thread.