Common Spangle Gall

Neuroterus quercusbaccarum

Common Spangle Galls found on oak leaves are produced by the asexual generation of a gall wasp, which is the same species responsible for the currant galls. These disc-shaped galls are topped with tufts of reddish hairs. In autumn, they detach from the leaf, and the larvae remain in the leaf litter to overwinter. Also found on Sessile Oak.