| Genera | Species | |||||
| native | naturalised | casual | native | naturalised | casual | |
| Total | 4 | 10 | 1 | 11 | 18 | 6 |
| Chatham Islands | 1 | 1 | 0 | 2 | 3 | 0 |
| Kermadec Islands | 0 | 4 | 0 | 0 | 4 | 0 |
| North Island | 4 | 6 | 1 | 9 | 13 | 5 |
| South Island | 3 | 7 | 1 | 7 | 14 | 2 |
| Stewart Islands | 1 | 1 | 0 | 2 | 1 | 0 |
| Three Kings Islands | 1 | 0 | 0 | 1 | 0 | 0 |