Butterfly fauna of Chiyoda Tree Nursery, Forestry and Forest Products Research Institute, Kasumigaura City, Ibaraki Prefecture, central Japan
2017
Inoue, T. (Forestry and Forest Products Research Institute (FFPRI), Hachioji (Japan). Tama Forest Science Garden)
A list of 71 butterfly species recorded in Chiyoda Tree Nursery, Forestry and Forest Products Research Institute, Kasumigaura City, central Japan from1997 to 2016 has been compiled from collection data. It consists of ten papilionid, six pierid, 17 lycaenid, 30 nymphalid and eight hesperiid species. Three (Narathura bazalus, Argyreus hyperbius and Papilio memnon) and one (Hestina assimilis) of these species are thought to have invaded Chiyoda Tree Nursery in the 2000's and 2010's, respectivery. According to Tanaka's criterion, there are 51 forest species (71.8%) and 20 grassland species (28.2%) at the study site. The Sunose environmental index (EI) was 145, which indicated a 'good natural environment'. The percentage of Chinese (23.9%) geographical distribution-type species in Chiyoda Tree Nusery was higher, and Siberian (15.5%) and Pan-tropical (8.5%) type species were lower than the national average in Japan. Four Red Data species of Japan and/or Ibaraki Prefecture, Eurema laeta, Sasakia charonda, Artopoetes pryeri and Favonius yuasai were recorded.
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