Black widow venom hijacks the victim's nervous system. Pain becomes more severe — causing the abdomen to have a board-like rigidity. Black widows have a cocktail of neurotoxins that enhance the ...

Like the black widow, the brown widow spider typically ... Vertical and diagonal stripes along the abdomen of most adult females that may or may not be easily identified. The telltale hourglass ...

Although they resemble black widow spiders, they are not as harmful ... An additional species, Steatoda paykulliana, is an occasional import in fruit shipments. Abdomen markings: All species have ...