皇居及び赤坂御用地の鳥類調査概況(1966年度)
1967 年 5 巻 1 号 p. 1-12
詳細
1967 年 5 巻 1 号 p. 1-12
1. This is the second report on the result of monthly census (but lacking a few months) made during April 1966 and March 1967 in the Imperial Palace (4km) and Akasaka Palace (2km) by six research members.
2. The census was made by line transect through the same routes as those of the previous year. In total 64 species, with addition of 6 species to the previous year list, in the Imperial and 56 species, with 11 additions at Akasaka palace, were recorded
3. Comparisons of the census by year at each Palace and between two palaces are discussed.
4. During January to March, a flock of more than 1, 400 Carrion Crows, Corvus corone, concentrated at the Imperial Palace, returning from their morning feeding areas (E-S-W directions) from about 10.00am. Such a concentration has not been seen in the previous year.
5. In general, bird density was higher at Akasaka Palace with smaller area.
