著者

山際 虎二

出版者

The Ornithological Society of Japan

雑誌

鳥 (ISSN:00409480)

巻号頁・発行日

vol.14, no.66, pp.14-23_1, 1955

---

First, the history of the lake as waterfowl resort (less than 20 acres) and later artificial interferance are mentioned. After the war, eight swans (<i>C. c. cygnus</i>) were first noticed on January 28, 1950, by Mr. J. Yoshikawa, by whose painstaking effort not to alarm them, and by effective help of Mr. K. Nitta, the swan increased to 42 on February 17 (46 birds in March). The maximum of 27 birds in 1951, 39 in 1952, 33 in 1953 and 32 in 1954 have been recorded. Yoshikawa's effort to tame the swans was such that he or his asistants must watch the boys and dogs day and night, as the lake froze to allow them reach the swans. Then, after great offort, the stream water was poured into the lake to keep it free from freezing, and the swans were fed with grains. In the third year of feeding, his effort was proved fruitful as the swans became so tame as to come to him at his calling voice to eat grains a few meters from him. They were however watchful to the voice of the other persons. As the lake is in the village, there are still occasional annoyance, for example, the fireworks.