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BLACK HOUSE SPIDER

black house spider pest control sydney

Black house spiders can be found throughout Australia. They are usually found on rough-barked trees and when they come inside buildings they are often found in corners, around windows and doorways and any other light source that can attract prey.

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Black house spiders can be found throughout Australia. They are usually found on rough-barked trees and when they come inside buildings they are often found in corners, around windows and doorways and any other light source that can attract prey.

Alternative Names

Window Spiders

Grey House Spider

 

Appearance

  • 1-1.5cm in body length and a 3cm leg span
  • The female is larger than the male
  • The dorsal and legs are dark brown to black in colour while the abdomen is charcoal grey with white markings.
  • Their webbings are often mistaken for funnel web spiders as the black house spider constructs funnel looking webs

Lifecycle

  • The female constructs several white silk eggs sacs secured within the web retreat.
  • The female stays with the eggs until they hatch. The spiderlings then disperse
  • The spiders mature during the summertime and live for about two years

Habits

  • The web of the black house spider is an untidy, lacy sheet with a funnel like entrance
  • Their webs can be found on tree trunks, logs, rock walls, buildings, window frames and crevices.
  • In built up areas it is common to find Black House Spider building webs in dark corners of windows, veranda’s, sheds or fences.
  • The female black house spider never leaves her web unless she is forced to. She constantly repairs and adds to her web.
  • Older webs can look grey and woolly from the constant additions of silk

The Bite

  • Bites often occur when the spider feels threatened.
  • Black house spiders venom is poisonous but no fatal
  • The bite causes excruciating pain and swelling
  • Nausea, vomiting, sweating & dizziness have also been associated with a black house spider bite.

Predators

  • White-tailed Spider
  • Parasitic wasp
  • flies