The spider is probably a black widow, they are dangerous because they have extremely poisonous venom
That could be the Redback spider and the Whitetail spider.
The common black house spider eats redback spiders. This probably explains why redbacks are uncommon inside the house. Both redbacks and black house spiders are shy (especially the redback). A house spider will get to recognize you if you feed it ;)
a redback spider
Redback
i think the Australian redback but i am not sure u could look it up u kno don't be lazy
Redback
Redback
the redback?
They are endemic to Australia
Two poisonous spiders found in Australia are the Redback spider (Latrodectus hasseltii) and the Funnel-web spider (Atrax and Hadronyche species). Both spiders can deliver a potentially dangerous venomous bite to humans.
yes they can be crossbred red back spiders
http://en.wikipedia.org/wiki/Redback_spider