The red widow is the least venomous widow there is and also one of the most shy. Its scientific name is latrodectus bishopi.
Where is it?
how poisonous is it
The red widow has an LD of 2.2 mg /kg which is 1000 times less potent than its cousin the black widow (.002 mg/kg) but you won't have to worry about avoiding these things because they are extremely shy.