Picture shows Asian hornet, undated. The Asian hornet has not disappeared from Hamburg, health authorities in the German city have confirmed. (NewsX/Bee)
Picture shows Andrena pellucens, undated. Environmentalists in Austria have revealed the "sensational" discovery of a rare solitary pollinator. (Karim Strohriegl, NewsX/Bee)
Picture shows Male Xanthesma (Xenohesma) brachycera, undated. Two different Australian bee species are actually males and females of one type, DNA tests have revealed. (CURTIN UNIVERSITY, NewsX/Bee)
Oliver Wieckhorst speaks in undated footage. He is closely monitoring the situation for NABU, a German organisation focusing on the protection of the environment. (NewsX/Bee)
Picture shows Asian hornets, undated. A bumblebee species is dropping to the ground to protect itself from being killed by an infamous type of hornet, researchers have found. (Sandra Rojas-Nossa, NewsX/Bee)