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Leptoglossus occidentalis
Western Conifer Seed Bug
Family: Coreidae

A very large and spectacular squashbug which has characteristic expansions on the hind tibiae and a white zigzag mark across the centre of the forewings.

This species is native to north America, and was introduced into Europe in 1999. It has since spread rapidly, and during autumn 2008/2009 influxes of immigrants were reported from the coast of southern England. A wide scatter of inland records also suggested arrival via timber shipments.

The bug feeds on pines and may become well-established here. It is regarded as a pest and currently all sightings should be reported to FERA. It is attracted to light and may also enter buildings in search of hibernation sites.

Adult: All year
Length ~20 mm
Leptoglossus occidentalis
Adult: Cumbria (October 2008) ©Rob Petley-Jones

Leptoglossus occidentalis Leptoglossus occidentalis
Adult: Hants (October 2008) ©Ian Thirlwell Adult: Sussex (August 2008) ©Andy Phillips