Baguer les Goélands bruns pour comprendre leur biologie

In this article, we present you the Lesser Black-backed Gulls (Larus fuscus) (LBBG) ring-tibia program organized by the GRO (www.gull-research.org). We propose you a presentation of the notion of « calendar year » in large gulls, the distribution of the subspecies of LBBG in Western Europe, the historical of the GRO, different study areas (in Nederlands and in France) and the call for observers to transmit their data through the form : www.gull-research.org/moerdijk/report.php.
Birds were ringed as pulli in the Nederlands, and more recently (2006), in Vlissingen (Port) and in Belgium (Antwerpen and Oost-Vlaanderen). At Moerdijk we used tibia rings in the colours lime, orange and yellow. At Vlissingen (Port) also yellow. In Belgium the colour Blue is used. Lime rings are placed LBBG on the left tibia (metal left tibia) all read upwards Orange rings are also placed by LBBG on the left tibia (metal left tibia) all read upwards Yellow rings are used on LBBG and placed at the right tibia (metal right tarsus) all read downwards (except the F-codes). Blue rings are used on LBBG in Belgium and placed at the left tibia (metal left tarsus) all read upwards.