[n = 5]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| 1956 - 1957 | Unknown | Congo Dem Rep | established | |
| 1950 - 1959 | Unknown | Zimbabwe | not established | |
| 1968 | Zambia | Tanzania | established | some |
| 1973 | Botswana | South Africa | established | probably some |
| 1980 | Botswana | Kenya | unknown | unknown |