[n = 24]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Unknown | Switzerland | established | probably some |
| unknown | Unknown | Albania | probably established | unknown |
| unknown | Unknown | Austria | established | probably some |
| unknown | Columbia River, Washington | British Columbia | established | unknown |
| unknown | Unknown | Ireland | probably established | |
| unknown | Germany | Poland | established | some |
| unknown | Spain | Portugal | established | |
| unknown | Unknown | Russian Federation (former USSR) | established | |
| 1980 - 1989 | Unknown | Spain | established | some |
| 1800 - 1899 | Italy | UK | established | |
| 1800 - 1899 | North America | Italy | established | probably some |
| 1871 | USA | France | established | |
| 1882 | USA | Belgium | established | some |
| 1885 | USA | Germany | probably established | some |
| 1890 | United States of America | Norway | established | unknown |
| 1900 | Unknown | Denmark | not established | unknown |
| 1900 | France | Netherlands | established | |
| 1900 | Germany | Netherlands | established | |
| 1900 | USA | Netherlands | established | |
| 1902 | Italy | Hungary | established | some |
| 1902 | Germany | Hungary | established | some |
| 1905 | USA | Yugoslavia | established | probably some |
| 1907 | USA | Chile | established | |
| 2003 | Unknown | Czech Republic | no data | no data |