Entoma
Mottled dingy-brown click beetle, Agrypnus murinus, plate

Click beetles

Agrypnus murinus

Mottled dingy-brown click beetle

Its wireworm larvae can live underground for around two years feeding on roots before the short-lived adult beetle ever takes to the air.

WhereGrassland, scrubland and dunes
Size10 to 17 mm long
WhenApril to July

The whole body is covered in dense grey-brown, scale-like hairs that give it a dusty, mottled look, with reddish-brown legs and antennae and the elongated proportions typical of click beetles. Like its relatives, it can snap its body straight with a sharp click to right itself or startle a predator.

Its wireworm larvae live in the soil for around two years, feeding on grass roots, worms and other small invertebrates, before pupating in late summer and adults overwintering underground until spring.

Traits

Habitat

Grassland

Colour

Brown, Grey

Active

Day and night

To people

Larvae (wireworms) can damage potato and other root crops

Activity through the year

Often confused with

Chequered click beetlenot in guide
Prosternon tessellatum

The chequered click beetle is slightly smaller at 9 to 11 mm and shows short golden-brown hairs arranged in a chequered pattern, unlike the uniformly mottled grey-brown coat of Agrypnus murinus.

Questions

Is the Mottled dingy-brown click beetle dangerous to people?

Larvae (wireworms) can damage potato and other root crops.

When can you see the Mottled dingy-brown click beetle?

The Mottled dingy-brown click beetle can be seen from April to July, by day and at night.

Plate retouched from a photo by Francisco Welter-Schultes, CC0, Wikimedia Commons Licence

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Beetles›Click beetles›Agrypnus

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