Their brown, black, white, grey, and tan coloration helps ... They are easy to spot and identify because of their unique shape. These small spiders are generally less than an inch long.

They are generally dark brown or shiny black when fully grown, and some may have a pair of red spots instead or have no marking at all. Male spiders can also have red or red-and-white markings on ...

Black widows are notorious ... But bites can be fatal—usually to small children, the elderly, or the infirm. Fortunately, fatalities are fairly rare; the spiders are nonaggressive and bite ...