| 1989 | 1994 | 2000 | 2000 | 2007 |
 |
 |
 |
 |
 |
| SG 251 | SG 745 | SG 1618 | SG 1711 | SG 2268 |
| Scott 207 | Scott 336g | Scott 554b | Scott 570c | Scott 889a |
| MS | MS | MS | MS | |
| Palau Scops Owl | Palau Scops Owl | Palau Scops Owl | Palau Scops Owl | Palau Scops Owl |
| 2014 | 2014 |
 |
 |
| SG | SG |
| Scott | Scott |
| Sheet | Sheet |
| Buffy Fish Owl & Barking Owl | Morepork & Indian Scops Owl |
| 2014 | 2014 |
 |
 |
| SG | SG |
| Scott | Scott |
| Ural Owl | Little Owl |