Acorn Weevil - Curculio glandium

    Description

    Length 4 to 8 mm. The most striking feature of the acorn weevil is its elongated snout, known as a 'rostrum', which is longer in females than males. Adults have a brownish and patterned body. Wevils in this genus can be hard to tell apart. C. glandium has 3 segments in the bulbous end of its antennae whereas C. nucum has 4 segments.

    Similar Species

    curculio.JPG

    Curculio nucum and Curculio glandium are very similar but can be distinguished by the shape of the antennal club. C. glandium (on the left) has a narrower and more tapered club than C. nucum (on the right).

    Photo ID?
    Habitat

    Lives in Oak trees.

    When to see it

    Peaking in summer and autumn.

    Life History

    The female uses the long rostrum (snout) to bore into the centre of an acorn to lay her egg. The larva feeds within the acorn and eventually bores its way out. The larvae are short, and cylindrical in shape, and move by means of ridges on the underside of the body.

    UK Status

    Relatively common, particularly in the south of Britain.

    VC55 Status

    Fairly frequent in Leicestershire and Rutland. There were a total of 25 VC55 records for this species up to March 2015.

    Leicestershire & Rutland Map

    UK Map