Distribution and Status of the Ryukyu Robin Erithacus komadori
Distribution and Status of the Ryukyu Robin Erithacus komadori
复制标题
琉球知更鸟的分布和现状
DOI：
10.3312/jyio1952.21.224
复制
发表时间：
1989
影响因子：
--
通讯作者：
H. Higuchi
中科院分区：
文献类型：
--
作者：
N. Kawaji;H. Higuchi
从野外观察、博物馆皮肤、参考文献和个人交流等方面对琉球知更鸟的分布进行了调查。该种为日本西南部特有种，有一只标本，一只雄性，来自韩国和一只来自台湾的目击记录。在托卡拉群岛北部的繁殖季节观察到的个体很多，但留在冬季的个体很少，而另一方面，在南部的Yayeyama岛屿上几乎没有记录到这种物种，而且都是来自非繁殖季节。看起来，它的一些北方种群在冬天会迁徙到南方。在我们的比较中，黑田东彦(1923)描述的他的新体型--subrufus的尺寸和羽毛特征与komadori的那些不够明显。此外，在迁徙季节，即10月，在Yonakunijima采集了枯草E.K.的模式标本。因此，可以断定，小种是komadori的同义词。琉球知更鸟的零星分布揭示了它在过去更广泛的分布中最近的遗迹地位。
The distribution of the Ryukyu Robin Erithacus komadori was investigated from field observations, museum skins, references and personal communications. The species is endemic to southwestern Japan, with a single specimen, a male, from Korea and one sight record from Taiwan. Many individuals have been observed in the northern Tokara Islands in the breeding season, but few remain in winter, while on the other hand, there are few records of the species in the southern, Yayeyama, islands, and all are from nonbreeding season. It seems that some of its northern populations would have migrated south in winter. The measurements and plumage characters described by Kuroda (1923) for his new form, subrufus, are not distinctive enough, in our comparison, from those of the race komadori. Furthermore, the type specimen of E. k. subrufus was collected in Yonakunijima in the migratory season, October. It is, therefore, condluded that the race subrufus is a synonym of komadori. The sporadic present distribution of the Ryukyu Robin reveals its recent relic status from its former more extensive distribution.