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| Coordinator: Greg Neubauer Marcin Przymencki Albert de Jong Mars Muusse cachinnans plumages | Larus cachinnans 1CY, October 19 2010, Bøgeskov Havn, Stevns, Denmark. Picture: Birger Lønning. Still active moult in lower scapulars. No tertials and coverts replaced in post-juvenile moult. 
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