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The European hornet (Vespa crabro) is the largest eusocial wasp native to Europe. It is also the only true hornet (genus Vespa ) found in North America , having been introduced to the United States and Canada from Europe as early as 1840.
The adult then eats its way through the silk cap. This first generation of workers, invariably females, now gradually undertakes all the tasks formerly carried out by the queen (foraging, nest building, taking care of the brood, etc.) with the exception of egg-laying, which remains exclusive to the queen. Life history of Vespa crabro
One unique aspect in this species is that it is a social parasite of Vespa crabro and sometimes Vespa simillima. The queen of Vespa dybowskii takes over the nest of the initial species, and somehow induces the workers to raise her own brood. [2] Eggs of V. dybowskii may survive in foreign species nests partly due to being chemically transparent ...
The European Hornet, Vespa crabro, was previously thought to be under reproductive pheromone control by the queen, thus explaining why the other females did not reproduce, even though they were capable of doing so. Experiments by Foster showed that the workers were instead regulating sterility in each other, thus instead exhibiting worker policing.
New queens and males (drones) are produced towards the end of the summer, and after mating, the queens hibernate over winter in cracks or other sheltered locations. The nests of most species are constructed out of mud, but polistines and vespines use plant fibers, chewed to form a sort of paper (also true of some stenogastrines).
The Oriental hornet (Vespa orientalis) is a social insect species of the family Vespidae. It can be found in Southwest Asia , Northeast Africa , the island of Madagascar (but no reports have been made of its presence on the island for many years), the Middle East, Central Asia, and parts of Southern Europe . [ 2 ]
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European hornet, Vespa crabro. Like all insects, wasps have a hard exoskeleton which protects their three main body parts, the head, the mesosoma (including the thorax and the first segment of the abdomen) and the metasoma. There is a narrow waist, the petiole, joining the first and second segments of the abdomen. The two pairs of membranous ...