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Zitronenfalter, Zitronen-Falter (Gonepteryx rhamni), Weibchen saugt Nektar an der Blueten von Wasserdost, Eupatorium cannabinum, Deutschland, Rheinland-Pfalz | brimstone (Gonepteryx rhamni), female sucking nectar at the blossom of a purple boneset, Germany, Rhineland-Palatinate (KEYSTONE/PICTURE ALLIANCE/Blickwinkel/J. Fieber)