常盤松御用邸の蝶類

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Twenty species of butterflies were observed or collected at the Tokiwamatsu Imperial Villa (ca. 2 ha, in area), central Tokyo, in 2003 and 2004: 3 species of Hesperiidae, 4 species of Papilionidae, 3 species of Pieridae, 4 species of Lycaenidae, 4 species of Nymphalidae and 2 species of Satyridae. In the 1980's, one of the authors, Prince Masahito, had once observed 4 other species of butterflies, Papilio bianor dehaanii, Artogeia melete, Argynnis paphia tsushimana and Yptima argus argus, which were not found in the present research. Therefore, 24 species of butterflies were found in these 25 years. It can be surmised that Artogeia melete and Yptima argus argus are extinct and Lycaena phlaeas daimio is endangered in this area. Palilio bianor dehaanii will still inhabit this area, and Argynnis paphia tsushimana is an accidental visitor in the garden. The number of butterfly species in this garden was fewer in comparison with other larger green tracts in urban central Tokyo, the Imperial Palace (Hisai et al., 2000), the Institute for Nature Study (Hisai & Yano, 2001), and the Akasaka Imperial Gardens (Yoshida & Ando, 2002; Owada et al., 2005), because of the small size of the garden and the lack of a large open land in the Villa. The discovery of Potanthusf. flavus, a "sasa", Gramineae, feeder, and Lycaena phlaeas daimio, an openland inhabitant, is, however, remarkable. These 2 species of butterflies are decreasing rapidly in the Institute for Nature Study.
2005-03-25

常盤松御用邸の蝶類

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