Giant House-spider - Tegenaria duellica

    Alt Name
    Tegenaria gigantea
    Description

    Females can reach 18 mm in length, with males having a slightly smaller body at around 12 mm to 15 mm in length. The female leg span is typically around 45 mm. The leg span of the male is highly variable, with spans between 25 mm to 75 mm being common. The Giant House-spider has the same colouration as the Domestic House-spider; it has earthy tones of brown and muddy red or yellow and a pattern of various sooty markings. They also have conspicuously hairy legs and abdomen.

    Similar Species

    Tegenaria duellica, T. saeva and T. atrica are all of a similar size and cannot be reliably separated without examining the genitalia. T. atrica is rare and has not been confirmed in VC55. T. saeva has a distribution covering Wales, Western and Northern Britain and has also not been confirmed in VC55. However distribution patterns change over time so it cannot be assumed that every large 'house' spider is T. duellica.

    Photo ID?
    Recording advice

    Examination of the genitalia is required to confirm this species.

    Habitat

    Indoors in dark corners, between boxes etc. where there is little disturbance.

    When to see it

    Males can often be seen wandering around during the late summer and early autumn looking for a mate. Females can reputedly live for several years and can survive for months without food or water.

    Life History

    They make large and substantial sheet webs with a funnel to their safety retreat.

    UK Status

    Common and widespread in Britain but fewer records come from the north.

    VC55 Status

    Common in Leicestershire and Rutland.

    Further Information

    2390 British records to Jan 2013

    Leicestershire & Rutland Map

    UK Map