[n = 5]
Year / Period | From | To | Established | Ecol. effects |
---|---|---|---|---|
unknown | Unknown | Spain | unknown | |
1970 - 1979 | Unknown | Philippines | unknown | |
1960 - 1969 | Unknown | Singapore | established | probably some |
1971 | Unknown | Canada | unknown | |
1971 | Unknown | USA | unknown |