| 1972 |
 |
| Snowy Owl, Short Eared Owl, Marsh Owl & Barred Owl |
| 1990 | 1990 | 1990 | 1990 | 1990 |
 |
 |
 |
 |
 |
| Imperf | Imperf | Imperf | Imperf | |
| Little Owl | Tawny Owl | Barn Owl | Short Eared Owl | Northern Hawk Owl |
| 2003 | 2011 | 2011 | 2011 |
 |
 |
 |
 |
| Sheet | Sheet | Sheet | |
| Snowy Owl, Saw Whet Owl & Snowy Owl | Stylized Owl | Stylized Owl | Stylized Owl |
| 2009 | 2009 |
 |
 |
| Unidentified Owls | Unidentified Owls |
