Bronze shieldbug

Troilus luridus

  1. Wildlife
  2. Invertebrates
  3. Bugs
  4. Bronze shieldbug


Perhaps one of the more difficult ones to spot, the bronze shieldbug lives amongst both broadleaf and coniferous trees and is most likely to be found in woodland habitats. Although it feeds on tree sap during its early stages of life, the bronze shieldbug is normally predatory and uses its long proboscis (straw like mouth parts) to feed on a variety of other insects such as caterpillars. The nymphs normally reach their adult stage during July and there is only one generation per year. 


The nymph is the bright red/orange individual, and the adult is the uniform bronze coloured individual. Shieldbug nymphs usually go through 4-5 stages before reaching full adult.

How to identify

Growing to sizes of 10-12mm in length, this large shieldbug is mostly brown/bronze with orange stripes around the edges of the abdomen. It can be separated from other species by the plain brown scutellum (the triangular section on its back) and the orange band around the top of the second to last segment of the antennae.

Where to find it

Widespread throughout the UK


When to find it

  • January

How can people help

Since the 1930s, we have lost almost half of our woodland to intensive agricultural practices and development, resulting in a dramatic loss of habitat for the creatures that live in dead and decaying wood. But you can help our minibeasts: by simply providing a small pile of logs in your garden, you'll make a refuge for everything from shield bugs to wood wasps, and a hunting ground for small mammals, reptiles and amphibians. To find out more about encouraging wildlife into your garden, visit our Wild About Gardens website: a joint initiative with the RHS, there's plenty of facts and tips to get you started.

Species information

Common name
Bronze shieldbug
Latin name
Troilus luridus
Grows up to 10-12mm in length