Entoma
Parent bug, Elasmucha grisea, plate

Parent bugs

Elasmucha grisea

Parent bug

Females stand guard over their egg cluster and young nymphs for weeks, one of the few insects in the region known to show extended maternal care.

WhereBirch and alder woodland and scrub
Size7 to 9 mm body length
WhenApril to October

This medium sized shield bug is usually reddish brown, though grey and green brown individuals occur, with a black and cream chequered band running along the edge of the abdomen and a dark patch on the scutellum. Females are noticeably larger than males.

Eggs are laid in a tight cluster on the underside of a birch or alder leaf, and the female then broods over them and the newly hatched nymphs, defending them from small predators until the young disperse.

Traits

Habitat

Woodland

Colour

Brown, Black

Active

Day

To people

Harmless to handle; it poses no bite or sting risk to people.

Activity through the year

Often confused with

Birch shield bugOpen entry ›
Elasmostethus interstinctus

Larger at 8 to 11.5 mm and mostly green rather than reddish brown, with a bright red tip to the wings and a more angular, flatter body outline.

Questions

Is the Parent bug dangerous to people?

Harmless to handle; it poses no bite or sting risk to people.

When can you see the Parent bug?

The Parent bug can be seen from April to October, by day.

Plate retouched from a photo by S. Rae from Scotland, UK, CC BY 2.0, Wikimedia Commons Licence

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True bugs›Parent bugs›Elasmucha

Last updated 2026-09-26. Every entry is checked against published sources.