![]() ![]() ![]() ![]() They also have the characteristic red hourglass shape on their underside. Brown widows are predominantly brown with alternating lighter and darker brown bands around their legs. Northern, southern and western black widows are usually black and younger individuals have additional red or white markings on their back, in addition to the red hourglass shape. Their characteristic feature is a red hourglass shape on the underside of their abdomen. The larger female spiders have a large round and shiny abdomen. Widow spiders reach a body size of around 1/2 in (10 mm) and can reach three times that length with extended legs. The least likely area to encounter a black widow is in Northern Texas, around Amarillo. The southern black widow (Latrodectus mactans) and the brown widow (Latrodectus geometricus) appear throughout Texas. The range of the western black widow (Latrodectus hesperus) extends from the West Coast as far as Odessa and Sanderson. Therefore, sightings of northern black widows in Texas are extremely rare and only in the far Northeast. until the border with Arkansas in eastern Texas. However, the range of the northern black widow (Latrodectus variolus) only extends from the Eastern U.S. To some extent, all four species occur in Texas. While the brown widow is considered less dangerous, the bite of a black widow can cause severe pain, muscle cramps, dizziness and nausea as well as local skin damage. There are four species of Latrodectus in North America: the Northern, Southern and Western Black Widow and the Brown Widow. Widow spiders are cobweb spiders of the genus Latrodectus. While almost all spiders are venomous (not poisonous), there are only two types of medically significant spiders in Texas: (black) widows and recluse spiders. Texas Spider Identification Poisonous Spiders in Texas. ![]()
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