Red widow spiders have entirely red-brown bodies, with the exception of their black abdomen. ©Florida Division of Plant ...

The black widow spider (Latrodectus spp ... genus in which there are 31 recognized species including the Australian red-back, brown widow spider (sometimes called the gray widow), and the ...

and the Western black widow. These spiders are identified by the characteristic red hourglass marking on the underside of their abdomens and are known for their neurotoxic venom, which can cause ...

The spider may be brown or have red legs. The western black widow. This spider is usually ... Pain might travel to your abdomen, back, or chest. You might sweat, have a fever, and become nauseated.