[n = 5]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| 1970 - 1979 | Unknown | Lithuania | not established | probably some |
| 1970 | Unknown | Latvia | probably established | |
| 1981 | USSR | Japan | unknown | |
| 1983 | USSR | China | unknown | |
| 1984 | Unknown | Poland | probably not established | unknown |