Black Guillemot
| Gender | undetermined |
| Age | adult |
| Plumage | breeding plumage |
| Recorded | 2010-07-18 |
| Location | Hornøya, Varanger, N |
| Copyright | Beat Rüegger |
| Gender | undetermined |
| Age | 1st calendar year |
| Plumage | 1st winter |
| Recorded | 2012-10-13 |
| Location | Helgoland, DE |
| Copyright | Beat Rüegger |
| Family | Auks |
| Status CH | |
| References | en.wikipedia.org |
| vogelwarte.ch |
21 | 22