北海道産のメジロに就いて

概要

論文の詳細を見る
Zosterops palpebrosa yesoensis Kuroda Jr. has been separated from Zos. p. japonica by Nagahisa Kuroda (1951). It is characterized by the upper part less greenish and darker, the yellow throat, the paler under tailcoverts and the flanks not in wine buff as in japonica but in pale buffish purple drab. The writer got 11 specimens of this subspecies in the suburbs of Sapporo, Hokkaido, and measured them (see Table 1). They were compared with the type-specimen and allied subspecies (Table 2). We could not find any difference from them in size, and their colour-phase had a greater affinity to japonica than to yesoensis. Perhaps the new subspecies may be of an abnormal colour-phase. The Hokkaido birds come from Honshu in spring, then breed in southern Hokkaido, and south down again in autumn, because it is never collected between December and April.
1955-04-15