| Invasion information |
| Range in Japan |
Miyagi, Fukushima, Kanto District except for Chiba, Osaka, Hyogo, Tottori, Shimane, Yamaguchi, Kochi, and Kyushu except for Kagoshima. |
|
| Origin |
Unknown. |
| Date |
Imported since mid-age. The first record of wild population was in 1980s in N Kyushu. The first record in Kanto District was in 1990 at Yamanashi Pref. |
| Route |
Deliberate: Escape or release of pet animal. |
| Impact |
Potentially: Competition with native birds, possibly for food. In Hawaii, invasion of this species causes decline of native birds. Native organism(s) affected: Native birds. |
| Regulation in Japan |
Import, transport and keeping are prohibited by the Invasive Alien Species Act. |
| Introduced range in other countries |
Hawaii |