[n = 6]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Unknown | Canada | unknown | |
| unknown | Unknown | Taiwan | established | |
| unknown | Unknown | Colombia | established | |
| unknown | Unknown | Philippines | unknown | |
| 1970 - 1979 | unknown | Singapore | not established | probably some |
| 1969 | Southeast Asia | USA | established |