著者

阿部 学 藤巻 裕蔵

出版者

日本鳥学会

雑誌

鳥 (ISSN:00409480)

巻号頁・発行日

vol.18, no.84, pp.272-275, 1968

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An adult female accompanied by 8 ducklings of <i>Mergus serrator</i> and an female with 3 ducklings of <i>M. merganser</i> were observed swimming over Reservoir Iwamatsu on July 8 and 9, 1964. This reservoir, ca. 3 km long and ca. 800 m wide, lies in the central part of Hokkaido, being surrounded by summer forests of <i>Betula Maximowiczii, Quercus mongolica, Ulmus Davidiana japonica, Cercidiphyllum japonicum, Tilia japonica, Acer mono</i>, etc.; a drag road and a forest railroad run together along its eastern coast (Fig. 1).