Woodlouse Spider - Dysdera crocata


Females 11 to 15 mm, Males 9 to 10 mm. It has a dark red thorax and orange-brown abdomen. There is one other very similar species - D. erythrina - and the two can only be separated by detailed examination. If we cannot be certain that an image is D. crocata , but it is likely to be this species, it is highlighted in a red box.

Identification difficulty

They are usually to be found under stones and logs in warm places, often close to woodlice. They have been found in houses.

When to see it

Hunts at night without the use of a web.

Life History

Their diet is comprised exclusively of woodlice. This species has especially powerful jaws that can pierce into woodlice.

UK Status

Fairly frequent and widespread in much of Britain.

VC55 Status

Fairly common in Leicestershire and Rutland.

Further Information

2259 British records to Jan 2013

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map