 Thus, it has been hypothesized that the Daito bird was just a straggler from the Honshū ("T. t. fumigatus"), the Yakushima/Tanegashima ("T. t. ogawae") or the Izu Islands ("T. t. mosukei") population (Vaurie, 1955).As the specimen exists (Yamashina Institute for Ornithology collection No.25476), it should be possible to resolve its status by DNA analysis.