Curculio villosus

Curculio villosus Fabricius, 1781 is a small weevil closely related to the more well known Acorn weevil (Curculio glandium) and Nut weevil (Curculio nucum) but bores its eggs not into the fruit body of the tree, but in gals on oak caused by the sexual generation of the gal wasp Biorhiza pallida. The larva of the wasp usually perishes because of food competition.