Butterfly fauna in and near the Ogawa Forest Reserve [Japan]
2003
Inoue, T. (Forestry and Forest Products Research Inst., Tsukuba, Ibaraki (Japan))
Abstract A total of 97 butterfly species were identified from the Ogawa area during 233 days of field survey conducted in 1996-2002. The species included 16 Hesperiidae, 8 Papilionidae, 7 Pieridae, 30 Lycaenidae, 23 Nymphalidae, I Libyiheidae, l Danaidae and 11 Satyridae. Of these, 17 were regarded as threatened species in lbaraki Prefecture and 7 in the whole of Japan. Also, 10 species that prefer primary forest or natural types of grassland as their habitats were identified. I estimated that approximately 100 butterfly species, i.e. 94 % of the fauna of lbaraki Prefecture, live in the Ogawa area at present. This rich butterfly fauna may be afforded by the land mosaic of the present area consisting of various types of forest, marshland, pastureland and farmland. It may also be closely related with the traditional human land use in agriculture and forestry, which have been practiced on a small scale in the present area until very recently.
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