LBBG graellsii 2cy H585 February 23 2008, Ciudad Real, Spain. Picture: Gabriel Martín.
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 tertials and wing-coverts still juvenile.
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