The Find-a-Spider Guide

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Black house spider

Fact Box
Badumna insignis (JS)
Note: This species is difficult to distinguish from B. longinqua
Previous species name:
Ixeuticus robustus
formerly Amaurobiidae
Body length:
female: 17 mm
male: 8 mm
In a web built into crevices in walls; also found under loose tree bark but the entrance always has webbing visible before the bark is lifted
May cause very mild illness
Badumna insignis
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The web
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Spiderlings & eggs
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A different species?
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Under female

This spider is often called the black house spider or window spider because it frequently builds webs in the crevices around doors and windows. Note that it does not normally establish itself inside buildings. It is said to be a favourite food of the white-tailed spider, Lampona murina.

Known Range: Found under loose tree bark or in outer wall crevices of dwellings all over Australia but probably less common in in the north-west of the country.

Spider(s) with a very similar appearance: Badumna longinqua.

Email Ron Atkinson for more information.    Last updated 8 January 2022.