The female of which poisonous spider has distinctive red marks on its abdomen?

um, redbacks do too

it's a bloody Redback.

WalksBySelf, the Black widow in US does not have stripe. The Australia Redback does (it is a type of Black Widow). This was not a good question. No Australian would call a Redback a Black Widow spider.

Redback spiders here in OZ have redbacks! Hence the name?!

Female redbacks in Oz also. They are a direct cousin of the Black widow

The black widow spider is the widow maker!! ( if y'all know what I mean!!!)

fyi brown recluse have what looks like a violin shape on their back. recluse are scary as heck. i have a friend who got bitten by one and has a wicked scar

oh I forgot about that.

Come on mate it's a bloody redback yous just described

I have an aversion to spiders . It is deep and all consuming

Ralph, Yes, it is a bloody redback! AND they are on the toilet seat, as ol' Slim Dusty sang! 😁