The Vespa simillima, including the subspecies known as the Japanese hornet or Japanese yellow hornet (Vespa simillima xanthoptera) (????????), is a common hornet species in the Eastern Hemisphere. V. simillima simillima (Japanese:????????, Korean: ????, "Hairy Wasp") is darker and hairier than V. simillima xanthoptera. V. simillima simillima lives in Hokkaido, Korean Peninsula, Eastern Siberia and China. It should not be confused with the Asian giant hornet (Vespa mandarinia), whose subspecies V. m. japonica is sometimes referred to as the Japanese giant hornet. In Japan, V. simillima xanthoptera is more common than V. simillima simillima. In Korea, V. simillima xanthoptera only lives in Jejudo.
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Predators
Due to the great scale of the swarm and aggressiveness of the yellow hornet, predation against yellow hornet by other hornet species are rare. However, along with other insects in Japan and Korea, they are prey to the Asian giant hornet. Since this predator is prey to the much bigger hornet, its nests have been known to be deserted after giant hornet attacks. The yellow hornet only attacks when their chance comes as they outnumber their giant enemy, which attacks yellow hornet colonies in smaller groups of 10 to 30.
Different type of predator from hornet species for yellow hornet is Vespa dybowskii. Unlike the Japanese giant hornet, predation against yellow hornet of Vespa dybowskii is parasitic. In the early stage of nest, the queen of the Vespa dybowskii tries to attack the queen of other hornets, including yellow hornet and European hornet. If the assault succeeds, it will steal the nest and all of the workers of the former owner become slaves.
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Danger
Yellow hornet has the greatest scale of the swarm in their nest from all of the hornet species, containing one to two thousands of entities. Although the Japanese yellow hornet is much smaller than the Japanese giant hornet, this hornet can be more dangerous to humans because they will attack people in greater numbers.
Source of the article : Wikipedia
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