Males are about half the size of the female and tan in color with light stripes on the abdomen.įemale black widows have dangerous venom that can cause pain, localized swelling, and nausea. Their bodies are black with a red hourglass shape on their undersides. The black widow is one of the most venomous spiders that are found in North America with females growing to half an inch (16mm) in body length. Western Black Widow Female western black widowĬommon name: western black widow, western widow. Male bites are not as severe as females, where a bite can cause intense pain. Juveniles tend to live in holes and small crevices.
They are common in urban habitats in California. They live in a variety of habitats and have been seen on fence posts to cacti. They are common throughout the year both indoors and outdoors. The noble false widow has a brown bulb-shaped abdomen with cream markings, that are similar to a skull shape with red to orange colored legs.įemales are larger than males and can grow to 14mm in body length, where males only grow to between 7mm and 11mm. They have an hourglass shape under their abdomen, which is bright orange to yellow. Their color ranges from dark brown to black or tan with shades of gray.
The brown widow is smaller and lighter in color than the venomous black widow. Scientific name: Latrodectus geometricus.Ĭommon name: brown widow, brown button spider, grey widow, brown black widow, house button spider, geometric button spider.
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