Aves, p�le ornithologique de Natagora

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Aves, 35/3-4 | 1998 | 222-223

  Observations of a Black-headed Gull (Larus ridibundus) with an abnormal bill in Meuse valley.
Farinelle, C.

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Article summary

During May-June 1998, a second year Black-headed Gull with an abnormalous bill was observed in the Meuse valley (above Liège). 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.

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