First Record of the Pallas's Warbler Phylloscopus proregulus in the Northern Japan

Abstract

On 22 September 1982, a Pallas's Warbler Phylloscopus proregulus was obtained in the Sea of Japan off the coast of Iwanai in Hokkaido. In our country this species has only been observed on 21 April 1964 on Tsunoshima Island in Yamaguchi Prefecture. The speciman in this short comunication is classified to Phylloscopus proregulus. We consider that the main migration route of this subspecies is formed in the inside of the eastern Asia including the coastal area. The Pallas's Warbler obtained seemed to be strayed from the main migration route to sea by a strong wind from the low pressure.