Length 8-10mm. A distinctive species and the sole member of its family to occur in the UK. Usually brachypterous in Britain, but macropterous adults have recently been recorded.

Corizus hyoscyami is superficially similar although not closely related. 

Unless identified by a recognised expert, a photo is required.

Usually associated with Tree Mallow and Lime trees, feeding on the fruits. Forms dense and conspicuous aggregations.

All year.

Historically very rare but now spreading rapidly from the south east.

Newly arrived (2026) but likely to become common.

https://www.britishbugs.org.uk/heteroptera/Pyrrhocoridae/p_apterus.html