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Halyomorpha halys Brown Marmorated Shieldbug Family: Pentatomidae A large shieldbug which has banded antennae and requires careful separation from the similar Rhaphigaster nebulosa. The best distinguishing features concern the shape of the head, which is rather rectangular and parallel-sided in H. halys and the absence of a forward pointing spine on the underside of the abdomen. There is usually a row of small pale marks along the front edge of the scutellum. May superficially resemble Dolycoris baccarum, but lacks hairs. Nymphs have characteristically spiny pronotal margins and are generally easier to recognise than adults. Native to Asia, H. halys has been accidentally introduced into north America and parts of continental Europe, where it is regarded as an invasive species. The bug is extremely polyphagous and can be a serious pest of fruit trees and other crops. Adults also enter buidlings during hibernation when they form aggregations which can pose a nuisance. Since 2010 there have been several reports of H. halys intercepted at the UK border in imported goods. However, there have been a number of more recent reports in the wild, including the capture of two males in pheromone traps. This suggests that the species might soon become established in parts of England, in particular the London area, which benefits from the urban heat island effect. Adult: All year Length 12-17 mm
	Adult:  ©Tim Haye (CABI)
Adult:  ©Tim Haye (CABI)	Adult aggregation:  ©Tim Haye (CABI)
Late instar nymphs:  ©Tim Haye (CABI)	Mid instar nymph:  ©Tim Haye (CABI)
Early instar nymphs:  ©Tim Haye (CABI)	Eggs:  ©Tim Haye (CABI)