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Birch Shield Bug

Birch Shield Bug ©Ian A Kirk

Birch shieldbug

As its name suggests, the birch shieldbug can be found feeding on silver birch, and sometimes hazel, in mixed woodland. Adults hibernate over winter, emerging in spring to lay their eggs.

Scientific name

Elasmostethus interstinctus

When to see

May to October

Species information

Statistics

Length: 0.8-1.1cm
Common.

About

A smaller relative of the hawthorn shieldbug, adults of the red-and-green birch shieldbug are particularly abundant in the early autumn. They go into hibernation over the winter, emerging again in spring to lay their eggs. The nymphs hatch and develop in summer, feeding on silver birch and sometimes hazel.

How to identify

The birch shieldbug is green, red and brown - similar to the hawthorn shieldbug. But it is smaller, has slightly duller colouration, and does not have the projecting shoulders.

Distribution

Widespread.

Did you know?

Most shieldbugs feed on plant sap and, although some can become pests of crops, most gardeners enjoy their presence. To digest the sap, shieldbugs need the help of symbiotic bacteria. To ensure they get the best start in life, the female will smear her eggs with these bacteria so that the young nymphs ingest them as they feed on the egg case.