Invasion information | ||
Range in Japan | Central part of Okinawajima Island. | |
Origin | Unknown. | |
Date | This species was imported since 1970s, and recorded in the field since late 1970s. | |
Route | Deliberate: Imported for exhibition in zoo and for medicine. | |
Impact | Predation, competition. Native organism(s) affected: Mammals, birds (predation). Snakes (competition). Spread of this species to northern part of Okinawajima Island could threaten endemic and endangered birds and mammals, such as Gallirallus okinawae, Erithacus komadori namiyei, Diplothrix legata, Tokudaia muenninki, etc. | |
Regulation in Japan | Import, transport and keeping of a subspecies E. t. friesi in Japan are prohibited by the Invasive Alien Species Act. The other subspecies except E. t. schmackeri is designated as an Uncategorized Alien Species, which requires a risk assessment before import to Japan. | |
Introduced range in other countries | None |
Reference | Notes |
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E. t. friesi is designated as 100 of the Japan’s Worst Invasive Alien Species A recent molecular systematic study suggested taxonomic change of classification of genus Elaphe sensu lato. In the revised classification, this species is placed in the genus Orthriophis. |