This bird was marked on July 13, 2012 on Helgoland in a mixed Herring Gull L. argentatus x Lesser Black-backed Gull L. fuscus colony. Initially it was recorded as Herring Gull, but based on a photo made August 16, 2012 it was re-labeled as Lesser Black-backed Gull. Also in February 9, 2013 it showed a mix of characters with the head profile and moulted scapulars, and upper tail coverts reminiscent of Herring Gull, while the inner primaries are Lesser Black-backed Gull like.