Polygonum bistorta
| Gender | undetermined |
| Age | undetermined |
| Plumage | undetermined |
| Recorded | 2006-06-17 |
| Location | Lac de Joux VD-CH |
| Copyright | Florence Rüegger |
| Family | Polygonaceae |
| Status CH | |
| References | en.wikipedia.org |
| vogelwarte.ch |
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