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出典:『Wikipedia』 (2011/06/07 03:13 UTC 版)

英語による解説

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Wasps of the cosmopolitan genus Polistes (the only genus in the tribe Polistini) are the most familiar of the polistine wasps, and are the most common type of paper wasp. It is also the single largest genus within the family Vespidae, with over 300 recognized species and subspecies. Their innate preferences for nest-building sites leads them to commonly build nests on human habitation, where they can be very unwelcome; although generally non-aggressive, they can be provoked into defending their nests. All species are predatory, and they may consume large numbers of caterpillars, in which respect they are generally considered beneficial. The European paper wasp, Polistes dominula, was introduced into the US about 1981 and has quickly spread throughout most of the country, in most cases replacing native species within a couple of years. This species is very commonly mistaken for a yellowjacket as it is black, strongly marked with yellow, and quite different from the native North American species of Polistes. Polistes wasps can be identified by their characteristic flight; their long legs dangle below their body, which is also more slender than a yellowjacket.