Raspberry Beetle - Byturus tomentosus


Length: 3.2 to 4 mm. This small beetle has a chestnut-red or golden appearance, with legs and antennae all of similar colour.

Similar Species

Byturus tormentosus and B. ochraceous are very similar but can be distinguished by careful viewing.

B. tormentosus is slightly smaller (up to 4mm), has smaller eyes and has elytra that taper outwards slightly towards the base. It is also lighter brown. B. ochraceous is a little larger (up to 5mm), a shade darker, with larger eyes and elytra that are generally parallel-sided. The elytral margins are also different: tormentosus has a narrow margin visible along most of the base whereas the margin in ochraceous is obscured by the humeral bulge of the elytra.

A helpful comparison can be found on the WCG website.

Identification difficulty
ID guidance
  • the largest diameter of the eye is less than half the width of the frons (space between the eyes)

Though the beetle larvae are pests for Raspberry growers, adults can be found feeding on pollen on a variety of wildflowers. The small adults often congregate within flowers, particularly composites such as Dandelion.

When to see it

May to July.

Life History

It lays its eggs on the flowers of Raspberries, Blackberries and Loganberries. When the larvae hatch they eat the developing fruit.

UK Status

Common in England and Wales, less so further north.

VC55 Status

Common in Leicestershire and Rutland. There were a total of 74 VC55 records for this species up to March 2015.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map