BLACK HOUSE SPIDER

BLACK HOUSE SPIDER

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
  • The abdomen is charcoal grey with white markings
  • Their webbings are often mistaken for funnel web spiders

LIFECYLE

  • 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 

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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 

PREDATORS

  • White-tailed Spider
  • Parasitic wasp
  • Flies 

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