1982 年 14 巻 2-3 号 p. 187-205
This report reviews the ecological conditions among the environments in and around Tokyo during the period 1950-1954 and lists those bird species found abundantly in each habitat sector. It attempts to relate these species to month or season and shows numerical differences of each species listed both in a given habitat and in many cases in several habitats. The most adaptable species, such as the Tree Sparrow, were often the most populous species in several habitats or for several months. However abundant specialized species or migrants often dominated the numbers tallied when they were present. There were 157 species recorded during the four years. Among these 88 species were commonly seen in numbers great enough for analysis of distribution by month. There were 41 species included among those that made up the five most common birds in winter and 45 species in summer.