| 1967 | 1969 | 1971 | ||||||
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| Stylised Owl | Stylised Owl | Stylised Owl |
| 1971 | 1976 | 1979 |
 |
 |
 |
 |
 |
 |
|
Stylised Owl |
Stylised Owl |
Stylised Owl |
| 1984 | 1984 |
 |
 |
|
|
|
|
Great Grey Owl |
Stylised Owl |
| 1984 | 1988 | 2000 |
 |
 |
 |
 |
 |
|
|
Stylised Owl |
Stylised Owl |
Unidentified Owl |
| 2003 |
 |
|
|
| Unidentified Owl |
| 2005 | 2006 | 2006 |
|
|
 |
 |
 |
 |
 |
|
Stylised Owl |
Stylised Owl |
Unidentified Owl |
| 2006 | 2006 | 2006 |
 |
 |
 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl |
| 2006 | 2007 | 2007 |
 |
 |
 |
 |
 |
 |
| Stylised Owl | Stylised Owl | Stylised Owl |
| 2007 |
 |
 |
| Stylised Owl |