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Spider.
Found in garage.
It's markings don't seem to be false widow, and while it was behind an old blind in the garage I'm just not sure it was dark enough to be a "cave".
If it was America I would say Black Widow (Latrodectus mactans), and if Australia I'd say Red Back (Latrodectus hasseltii). Deffenitly in the same family though, very interesting! :-)