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A note on the Avi-fauna of the National Park for Nature Study. Old records on the Avi-fauna of the National Park for Nature Study are very scarce, because the area of the Park had been maintained under peculiar form of management. Probably the first of existing comprehensive reports might have been the record of observation taken by Godo Nakanishi on March 29,1949. However, full-scale Check-list of Birds has been that which was completed as N0.2 Collection of National Park for Nature Study Resource Materials in 1954. Nevertheless, the conclusive completion was the resource materials gathered by Shinji Takano from 1964-1965. Check-1ist of Birds brought to completion by Soichiro Tsuruta in 1966 enumerates 32 families and 96 species. However, some parts of its reports still required further examinations. This time, such aspects were re-considered, supplemented and revised. As its results, we found that birds observed in the National Park for Nature Study were 33 families, 98 species and sub-species. And, in adition, six species of pet birds fleed from the owners were noticed. Such survey, besides Chech-1ist of birds, was prompted by the project of Studies of Urban Ecosystem and considerations were added from various angles. Shinli Chiba (1969) indicated comparatively plentiful avi-fauna aspect, and he reported the increase of strong species well combined with areas of human activities, such as Tree-Sparrow, and Jungle-Crow. Nobuo Sakurai (1972) reported sudden decrease of breeding individuals of Great Tit along the Highways and due to construction of High storied buildings. By the way, S. Chiba (1972) pointed out that worsening of living environments prompted simplification of varieties in formation. And N. Sakurai reported (1973 & 1974) the co-relations between Great Tit and forest Vegetation. Such reports scrutinized precious value of the green spot remaining just like a solitary islet in the midst of a great city. Records from 1972 to 1975 were indicated as a table on occurrence and dominant value of Avi-f auna. As you see therein, bird communities in the National Park for Nature Study showed remarkable changes during. The last several years. Conspicuous changes in surrounding circumstances, brought about simplication of bird communities. Urbanized birds alone manifested increase in the number of individuales. Crows, Sparrows, Magpies, Turtle-doves, etc. are such typical examples. As to respective species, flying visits by Little-Egrets became oftener. Increase and decrease of flying visits by Mandarin Duck and Teals are happening with a cycle of 10 years. Moreover, Brown Hawk Owl, Buzzard, Jays, etc. stopped flying visits since 1963. On the contrary, Brown-eared Bulbuls became abiding birds, as we see all the year round. In addition, Housee-Pigions and some other pet birds remined us in connection with their frequent appearance, of the prevailing significant consequences of urbanization in the environments of the National Park for Nature Study.
国立科学博物館の論文
1978-02-25

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千羽晋示
国立科学博物館

自然教育園の鳥類について

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