LBBG graellsii 2cy H210 February 03 2009, Champteussé-sur-Baconne, SW France. Picture: Alain Fossé.
Ring series used at Amrum & Helgoland Islands, N Germany; two colonies in the transition zone between continental graellsii ("Dutch intergrade") and Scandinavian intermedius. Project run by Sönke Martens.
Scapulars replaced, visible wing-coverts and tertials still juvenile.
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