Curculio glandium is a species of weevil known as the acorn weevil. Its most striking feature is its elongated snout, known as a 'rostrum', which is longer in females than males. Adults have a brownish and patterned body. The larvae are short, and cylindrical in shape, and move by means of ridges on the underside of the body. It reaches a length of 4 to 8 mm.