Snake-back Spider - Segestria senoculata


This is an attractively marked spider which gets the English name from the row of dark coloured patches on the elongated abdomen said to resemble the markings on some poisonous snakes, such as the adder. Males 6.5-7.5mm, females 7-10mm. Prosoma blackish, lighter behind, opisthosoma light grey brownish spotted with black, dorsally with a median lobed black band, ventrally without band. 

Identification difficulty
Recording advice

Good photographs required. 


Lives in a tube constructed in a hole in a wall, under bark and stones or in rubble and scree, from sea-level to high altitudes. Frequent in woodland. 

When to see it

All year round, peaking from March to October.

Life History

This is a tube dwelling spider.

UK Status

Widespread and fairly frequent.

VC55 Status

Status in Leicestershire and Rutland not known.

Further Information

3,244 British records for this species to 2015.

Leicestershire & Rutland Map


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

UK Map

Species profile

Species group:
Records on NatureSpot:
First record:
14/05/1993 (Jon Daws)
Last record:
30/04/2022 (Cann, Alan)

Total records by month

% of records within its species group

10km squares with records

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