Giant House-spider - Tegenaria duellica
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 genus Tegenaria has recently been split: Tegenaria spp. have banded legs, Eratigena spp. have plain legs. Beyond this distinction, species can only be identified by examination of the genitals of mature specimens.
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.
Examination of the genitalia is required to confirm this species.
Indoors in dark corners, between boxes etc. where there is little disturbance.
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.
They make large and substantial sheet webs with a funnel to their safety retreat.
Common and widespread in Britain but fewer records come from the north.
Common in Leicestershire and Rutland.
2390 British records to Jan 2013
Leicestershire & Rutland Map
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