British Bugs
HOME A BIT ABOUT BUGS GALLERY SYSTEMATIC LISTS RECORDING BUGS CONTACT US LINKS

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.

Native to the USA and introduced into Europe in 1999, it has since spread rapidly and during 2008-2011 influxes of immigrants were reported from the coast of southern England, with a wide scatter of records inland.

The bug feeds on pines and is probably well-
established here; nymphs have been found at several locations. It is attracted to light and may enter buildings in search of hibernation sites in the autumn. Further information
Adult: All year
Length ~20 mm

see illustrated life stages chart
Have you seen this bug? Report a sighting

Leptoglossus occidentalis
Adult: Cornwall (October 2010) ©Tristan Bantock

Leptoglossus occidentalis Leptoglossus occidentalis
Adult: Cumbria (October 2008) ©Rob Petley-Jones

Adult: Sussex (August 2008) ©Andy Phillips

Leptoglossus occidentalis
Early instar nymph: south London (July 2010) ©Tristan Bantock