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Dolichovespula sylvestris
The tree wasp (''Dolichovespula sylvestris'') is a species of eusocial wasp in the Vespidae family from the temperate regions of Eurasia and is particularly common in western Europe. Despite being called the tree wasp, it builds both aerial and underground paper nests, and can be found in rural and urban habitats. ''D. sylvestris'' is a medium-sized wasp that has yellow and black stripes and a black dot in the center of its clypeus.〔 It is most common to see this wasp between May and September during its 3.5 month colony cycle. This wasp participates in worker-policing and has a haplodiploid sex determination system which results in a high level of relatedness within the colony.〔〔 The workers will take over all of the foraging from the queen once the first workers reach adulthood and typically forage for other insects, the nectar of plants, and wood to digest for nest construction.〔 The tree wasp is sometimes a victim of the nest parasite ''Dolichovespula omissa, ''who lays their eggs in the nest of ''D. sylvestris, ''as well as individual parasites including roundworms.〔〔
==Taxonomy==
The tree wasp was first classified in 1763 by Giovanni Antonio Scopoli, a naturalist and physician who is known for classifying many species. He originally classified it as ''Vespa sylvestris,'' and later it was moved to the ''Dolichovespula'' genus. ''D. sylvestris'' is now part of the small genus of 18 species of social wasps called ''Dolichovespula'' which includes species such as the bald-faced hornet (''D. maculata''), Saxon wasp (''D. saxonica''), and Median wasp (''D. media''). It is part of the subfamily Vespinae which includes social wasps, social hornets, and yellow jackets.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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