佐野昌男氏による「北海道利尻島におけるイエスズメの生息確認」は,雄1羽の渡来記録である
1992 年 40 巻 3 号 p. 112-113
詳細
1992 年 40 巻 3 号 p. 112-113
Sano (1990) stated that "one male and two young of the House Sparrow Passer domesticus were found on Rishiri Island." Evidence he presented, however, is too weak to exclude the possibility that the two birds were juveniles or females of another native species, the Cinamon Sparrow, Passer rutilans.
