Western conifer seed bug

Leptoglossus occidentalis

The western conifer seed bug, ''Leptoglossus occidentalis'', sometimes abbreviated as WCSB, is a species of true bug in the family Coreidae. It was originally native to the warm-temperate western USA but has in recent times expanded its range and become an invasive species in parts of Europe.

This species is sometimes colloquially called "the leaf-footed bug", but actual leaf-footed bugs are an entire group of species in ''Leptoglossus'' and related genera of the Coreidae; see for example the Florida leaf-footed bug, ''L. phyllopus''.

Western conifer seed bugs are sometimes mistakenly identified as stink bugs because of the unpleasant aroma they emit when disturbed.