Phylloscopus tenellipes borealoides
Kunashir, southern Kuril Islands, Russia.
In the past considered conspecific with P. tenellipes, but song distinct and also exhibits some small plumage differences. Monotypic.
Sakhalin, S Kuril Is and Japan (mainly Hokkaido and Honshu); non-breeding Ryukyu Is and possibly Malay Peninsula (recently recorded wintering in Singapore)#R.
Food and feeding
Status and conservation
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