Europe across temperate Asia to China and Japan
Fine-art photographic collection
Eurygaster testudinaria
A living shield whose enormous scutellum covers almost the whole abdomen like a beetle’s wing cases.
About this species
Tortoise Bug
Eurygaster testudinaria(Geoffroy, 1785)
Information reviewed15 July 2026
Eurygaster testudinaria is a variable brown shieldbug of damp grasslands, wetlands and woodland margins. Its enlarged scutellum extends over the abdomen, producing the rounded tortoise-shell outline that gives the insect its common name.
Taxonomy
Animalia · Arthropoda · Insecta · Hemiptera · Scutelleridae · Eurygaster
Accepted taxon. · checked 2026-07-15
Europe across temperate Asia to China and JapanBroad range and selected reference localities — not a complete occurrence map.
Damp grassland, sedge and rush habitats, wet woodland edges and brownfield sites.
Adults are active from spring to autumn and overwinter.
Feeds on grasses, rushes and sedges.
Solitary.
What makes this species remarkable?
The single shield-like scutellum stretches almost to the tip of the abdomen, making this true bug resemble a compact beetle.
It can be extraordinarily variable in colour, from pale straw-brown to dark mottled forms that look like different species.
A shallow groove at the front of the head is one of the key characters separating it from the almost identical Eurygaster maura.