| 1985 | 1987 |
 |
 |
| SG MS484 | SG MS595b |
| Scott 457 | Scott 577 |
| Tawny Owl | Barn Owl |
| 1995 | 1999 | 1999 |
 |
 |
 |
| SG 1445 | SG 2090 | SG 2101 |
| Scott 1298d | Scott 1615d | Scott 1616h |
| MS | MS | MS |
| Verreaux's Eagle Owl | Barn Owl | Pearl Spotted Owlet |
| 2012 | 2012 |
 |
 |
| SG | SG |
| Scott | Scott |
| Pel's Fishing Owl, African Grass Owl, Spotted Eagle Owl, African Wood Owl, Southern White Faced Owl & Cape Eagle Owl | Verreaux's Eagle Owl, Pearl Spotted Owlet, Barn Owl & Short Eared Owl. |