皇居内の鳥類調査概要(1970年度)
1971 年 6 巻 3 号 p. 217-230
詳細
1971 年 6 巻 3 号 p. 217-230
The sixth annual of monthly bird census in the Imperial Palace for April 1970-March 1971 is reported. The same route of 4.1km was censused usually from 9.40-11.30 a. m. The number of monthly rceorded species and individuals varied from 18 to 29 species, 70 to 609 birds, with seasonal inclusion of ducks in winter and colonial herons in summer. 52 species were recorded during this year period and the following five were new, Sturnus philippensis, Fringilla montifringilla, Acrocephalus bistrigiceps, Caprimulgus indicus and Gorsakius goisagi. In total 79 species have been recorded.
