| 1994 | 1999 | 2000 | |||
|
|
|
 |
|||
| SG 1295 | SG ? | SG ? | |||
| Scott 633 | Scott 1028G a, c & e | Scott 1088b | |||
| Sheet | Sheet | ||||
| Imperf | Imperf | Imperf | |||
| Stylized Owl | Barn Owl, African Eagle Owl & Tawny Owl | Common Scops Owl |
| 2000 |
 |
| SG ? |
| Scott 1082 |
| Imperf |
| Unidentified Owl |
| 2009 - Bogus? | 2010 - Bogus? |
 |
 |
| SG | SG |
| Scott | Scott |
| Sheet | Sheet |
| Imperf | Imperf |
| Northern Saw-whet Owl | Eagle Owl |
| 2013 - Bogus? | 2013 - Bogus? |
 |
 |
| SG | SG |
| Scott | Scott |
| Long Eared Owl, Northern Hawk Owl, Snowy Owl & Barn Owl | Snowy Owl, Tawny Owl & Eurasian Pygmy Owl |