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Trioza urticae
Family: Triozidae

A reasonably distinctively species in a large and difficult genus. Although the colour is variable, typically shows brown to black markings on a cream/white background colour. Combined with the yellowish, somewhat opaque membrane, relatively rounded (for Trioza) forewings with long outer vein and its occurrence on nettles, it is reasonably easy to identify.

The species is virtually ubiquitous on nettles across the UK, on which nymphs cause small, bladder-like galls. The adults overwinter, and there can be as many as four generations in the UK per year.

Adult: all year
Length 3-3.5 mm
Trioza urticae
Adult female: Huddersfield (February 2008) ©Joe Botting

Trioza urticae Trioza urticae
Adult female: Manchester (May 2008) ©Shane Farrell
Adult female: Huddersfield (November 2008) ©Joe Botting
Trioza urticae
Adult female: Huddersfield (March 2008) ©Joe Botting