Hymenoptera: Cynipidae - gall wasp Andricus corruptrix, lignicola or kollari Sexual bud galls, photographs on Quercus cerris, Turkey Oak Host (sexual generation): Quercus cerris, Turkey Oak The sexual galls and adults of Andricus corruptrix, Andricus lignicola and Andricus kollari are difficult / impossible to tell apart

Andricus corruptrix, lignicola or kollari - sexual gall
Upton Country Park, Dorset. May 2018