Black-crowned Night Heron
| Gender | undetermined |
| Age | adult |
| Plumage | breeding plumage |
| Recorded | 2012-05-20 |
| Location | Donaudelta, RO |
| Copyright | Beat Rüegger |
| Gender | undetermined |
| Age | 2nd calendar year |
| Plumage | 1st summer |
| Recorded | 2011-05-17 |
| Location | Donaudelta, RO |
| Copyright | Beat Rüegger |
| Gender | undetermined |
| Age | 2nd calendar year |
| Plumage | 1st summer |
| Recorded | 2018-05-29 |
| Location | Donaudelta, RO |
| Copyright | Beat Rüegger |
| Family | Herons |
| Status CH | uncommon migrant, irregular breeding bird |
| References | en.wikipedia.org |
| vogelwarte.ch |
7 | 172