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Natternkopf-Mauerbiene, Natternkopf, Echium vulgare, Gewoehnlicher Natternkopf, Osmia adunca, Hoplitis adunca, Wildbiene, Weibchen der Natternkopf-Mauerbiene auf Natternkopf Adder's head mason bee, adder's head, Echium vulgare, common adder's head, Osmia adunca, hoplitis adunca, wild bee, female of the adder's head mason bee on adder's head (KEYSTONE/mauritius images/ELKE SCHWARZER)