Redback spiders are a unique species that exist solely in Australia. If you need more information on them there are a number of websites available on Google.
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?
yes they can be crossbred red back spiders
The spider is probably a black widow, they are dangerous because they have extremely poisonous venom
http://en.wikipedia.org/wiki/Redback_spider
That could be the Redback spider and the Whitetail spider.