Japanese Butterflies Dying Out 里山のチョウ激減 [AdSense-A] In Japan, why are Japanese butterflies dying out? In the fields of Japan’s countryside, some 87 species of butterfly are thought to exist. Of these, according to a recent survey, the population of 40% of them has declined precipitously. Wildlife Survey Since 2003, Japan’s Ministry of the Environment has conducted a Monitoring Sites 1000 survey, which looks at the wildlife in 1000 areas around Japan. 2008 – 2017 In the ten-year period from 2008 to 2017, 50 areas were surveyed for butterflies each year. The findings were dire – 34 species are at risk of becoming extinct. Red List These species have been placed on the Ministry’s “Red List,” which is for those species at greatest risk of disappearing. Reasons for Japanese Butterflies Dying Out Researchers are not sure exactly what accounts for the drastic decline in butterfly populations. Possible reasons given were the decrease in satoyama landscapes and the decrease in wild flowers. Satoyama In the past, much of rural Japan was “satoyama.” This is an area between mountain foothills and farmable land. Sato means village, and yama means hill or mountain. As Japan has become more and more urban, these spaces have […]
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