Invasion information |
Range in Japan |
Breeding in Lake Utonai, Hokkaido, and overwintering in Kasumigaura, Ibaraki Pref. Observed in Aomori, Akita, Niigata, Toyama, Ishikawa, Yamanashi, Shizuoka, Aichi Prefs., Kanto, Kinki, Chugoku, Shikoku, and Kyushu Districts. |
|
Origin |
Unknown. |
Date |
Introduced to Hakodate, Hokkaido in 1975. Breeding in Lake Utonai, Hokkaido since 1978. |
Route |
Deliberate introduction. |
Impact |
Potentially: Possibly competitive with a native geese such as Anser fabalis middendorffii Native organism(s) affected: Native geese (e.g., Anser fabalis middendorffii) |
Regulation in Japan |
Release of this species is prohibited in Aichi Pref. |
Introduced range in other countries |
North America, Australia, New Zealand, South Africa, etc. |