Entoma
Striped oak bug, Rhabdomiris striatellus, plate

Plant bugs

Rhabdomiris striatellus

Striped oak bug

Nymphs of this bug suck sap from oak flowers and young seeds, but the adults turn predatory, hunting aphids and small caterpillars on the same tree.

WhereOak trees in woodland and parkland
Size7 to 9 mm body length
WhenApril to June

The body is yellow to reddish brown with yellow veins and dark stripes on the wings, and females are usually paler than males. A yellow-orange cuneus at the wing tip helps distinguish it from the larger, darker headed fine streaked bugkin.

Eggs laid in June overwinter and hatch in March or April. Nymphs feed on oak flowers and unripe seeds, while adults, present from April to June, become predatory, hunting aphids and small caterpillars on the same tree.

Traits

Habitat

Woodland

Colour

Yellow, Brown

Active

Day

To people

Harmless to people; a useful predator of aphids and small caterpillars on oak.

Activity through the year

Often confused with

Fine streaked bugkinnot in guide
Miris striatus

Larger, 9 to 11 mm, with an entirely dark head and a more elongate body, compared with the smaller striped oak bug and its yellow-orange cuneus.

Questions

Is the Striped oak bug dangerous to people?

Harmless to people; a useful predator of aphids and small caterpillars on oak.

When can you see the Striped oak bug?

The Striped oak bug can be seen from April to June, by day.

Plate retouched from a photo by Fritz Geller-Grimm, CC BY‑SA 3.0, Wikimedia Commons Licence

The plate on this page is shared under the same licence as its source, CC BY-SA.

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True bugs›Plant bugs›Rhabdomiris

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