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					 LBBG graellsii 2cy H891  April 22 2010, Pantín, Spain. Picture: Antonio Gutierrez.
					 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. 
					Wing-coverts, tertials and tail still juvenile. 
					  
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