the red back spider can live up to 1 year to 3
No. They are invertebrates
a redback has no affect on the environment accept killing the environment
"Redback spiders can be difficult to remove because mere spraying of pesticides cannot kill redback spiders. Their hiding places have to be identified. Brisbane Pest Control Specialists from Bob Gunn can correctly identiywhere redback spiders are hiding because they know the insect's life cycle and habits." Source: Achive.org - Removing Redback Spiders From The Home
what are red back appearances
Redback, found in Australia
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 ;)
Redback spiders in Australia like dark semi damp environments like in culverts, or under pot plants. But mostly dark tight places
I found this by google.The Redback spiders live everywhere throughout the Australian continent. Female Redback spiders are black in color with a very apparent red or orange stripe that is visible on the back of the spider. The female Redback spider is dangerous and almost always connected to human deaths. Redback spider bites cause severe pain at the site of the bite and cause other Answers.com to include: sweating, Answers.com weakness, vomiting, and nausea. Redback spider venom is a neurotoxin that affects the neurotransmitters causing there depletion. The Redback spider has caused several reported deaths of bitten human beings but none have died since the release of an antivenom. Over 250 bites receive antivenom treatment each year with many more cases most likely go unreported.
yes they can be crossbred red back spiders
The Red-back spider (Latrodectus hasselti) is commonly found in Australia. They are a small black venomous spider with long thin legs, and the females have a red stripe on their globular abdomen.
If by "redback spiders" you mean the kind of widow spiders that grow in Australia, they make the same kind of three-dimensional tangled filament webs that all the member of their Family make. Some other kinds of spiders make orb webs, sheet webs, etc.
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.