| Titre : | Observation of a Black-headed Gull (Larus ridibundus) with an abnormal bill in Meuse valley (1998) |
| Auteurs : | Charly Farinelle, Auteur |
| Type de document : | Article |
| Dans : | Aves (35(3-4) Avril, 1998) |
| Article en page(s) : | 222-223 |
| Résumé : | During May-June 1998, a second year Black-headed Gull with an abnormalous bill was observed in the Meuse valley (above Liege). The upper mandible was elongated and curved down, like a curlew's bill. The bird looked healthy but its feathers were not well cared for. |



