Neuroterus quercusbaccarum is a gall wasp that has two generations per year.

The Currant Galls of the sexual generation are spherical, smooth, succulent and berry-like.  They are up to 7 mm in diameter and vary in colour from pale yellow through green to red or purple. These galls occur on oak leaves or catkins in about May.

Other Neuroterus and Andricus species cause spherical or egg-shaped galls in oak catkins.

Under "Species", please select "f. agamic" or "f. sexual" as appropriate.  Provide photographs of the gall on the host plant, and note the host species.

English, Sessile and Turkey Oaks.

The agamic (asexual) Spangle Galls develop on oak leaves in late summer.  They fall from the leaves in autumn and the larvae overwinter in leaf litter.

The sexual Currant Galls occur on oak leaves or catkins in around May.

Common and widespread in Britain

Common in Leicestershire and Rutland