クビワキンクロの雄の渡来
1984 年 33 巻 1 号 p. 43-44
詳細
1984 年 33 巻 1 号 p. 43-44
An adult male Ring-necked Duck Aythya collaris was observed at Shinobazu Pond, Tokyo, from February 29 through April 9, 1984. It was seen with flocks of Pochards Aythya ferina and Tufted Ducks A. fuligula. This is the second record of Ring-necked Duck in Japan.
