Western Black Widow Range Map, Mar 4, 2019 · Latrodectus hesperus occupies the western third of North America.
- Western Black Widow Range Map, Males of the western widow are one-half to one-third the size of females, and they have a more elongate body form. The female's body is 14–16 mm (1/2 in) in length and is black, often with an hourglass -shaped red mark on the lower abdomen. . The body of the males typically range from 1/8 to 1/4-inch in length. S. This species adapts to various environments, including deserts and mountainous regions. An online resource devoted to North American insects, spiders and their kin, offering identification, images, and information. Western Black Widow (Latrodectus hesperus) Western Black Widow (Latrodectus hesperus) Species Kingdom Animalia Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. Image taken from the YouTube channel Kelvin Wiley , from the video titled Southern Black Widow Handling! . Southern Black Widow Latrodectus mactans is the classic black widow of popular imagination, the shiny, coal-black female with a vivid red hourglass on the underside of her abdomen. The black widow spider also occurs throughout all four deserts of the American southwest. Mar 29, 2026 · Geographic Range Within the United States, Latrodectus mactans ranges as far north as Massachusetts and New Hampshire, as far south as Florida, and as far west as California, Texas, Oklahoma and Kansas. The Western Black Widow primarily inhabits western North America, from British Columbia through the western and southwestern United States, and into Mexico. The best indicator for a western black widow is the geographic location. Dec 2, 2025 · Black Widow Range: A U. Northern black widows range across the northeastern states and southern Canada, adapted to colder temperatures. Oct 29, 2025 · This guide provides a clear, state-by-state southern black widow range map, helping you understand their habitat, identify them correctly, and take practical steps to coexist safely. If you’ve ever wondered whether black widows live in your state — or how close they are to your backyard — this article breaks it all down. The Southern Black Widow is common in the southeastern United States, extending north to Ohio and west into Texas, Oklahoma, and Arizona, with sightings in parts of southern Canada and Mexico. The Northern Black Widow (Latrodectus variolus) is associated with the Middle Atlantic states, such as New Jersey, Delaware Nov 10, 2025 · The presence of the three Black Widow species can be largely segmented by major geographical regions, though their ranges do overlap in certain areas. They are especially common in warm, temperate, and dry environments, where they can hide in sheltered locations. A black widow range map shows you exactly where these infamous spiders are found across North America. Mar 4, 2019 · Latrodectus hesperus occupies the western third of North America. The genus has a worldwide distribution and comprises 30 The spider species Latrodectus hesperus, commonly known as Western Black Widow, belongs to the genus Latrodectus, in the family Theridiidae. The southern black widow range map shows one of the most widely distributed venomous spiders in the United States. These spiders are similar in appearance to the Southern black widow. Sep 1, 2025 · Black Widow Spider Geographic Range The native range of black widow spiders covers much of the Western Hemisphere, with the highest concentrations in North America. Map of Hotspots Key Takeaway: Black widows are found in every U. Each one fills a different geographic niche, though their ranges overlap in several states. Jun 18, 2024 · Western Black Widow As one might suspect, the Western black widow is prevalent in the western regions of the U. This 'hourglass' mark can be yellow, and on rare occasions, white. Globally, species of black widows (genus Latrodectus) exist in parts of Europe, Africa, Asia, and Australia, but the Sep 23, 2026 · If you live in the continental United States, you’re within the range of at least one black widow species. Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. If you spot a black widow spider in California or on the Northern Pacific Coast, you are most likely looking at a Western widow spider. These spiders are known for their distinctive black coloring and Sep 11, 2020 · The larger female Western black widow looks very similar to the Northern black w idow and the Southern black widow female. Western black widows occupy the western states from California to British Columbia. Understanding which one depends on where you are. Latrodectus hesperus is most often sighted Geographic Range Westerm black widow spiders, Latrodectus hesperus , live in the warmer regions of the United States. They are not usually black in overall color, instead appearing light brown or gray and banded. Their most significant A member of the family Theridiidae, this genus contains 34 species, [8] which include several North American "black widows" (southern black widow Latrodectus mactans, western black widow Latrodectus hesperus, and northern black widow Latrodectus variolus). Besides these, North America also has the red widow Latrodectus bishopi and the brown widow Latrodectus geometricus, which, in addition to Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. states like California, Arizona, and Texas. Primary Regions: The South and West Black widow spiders, primarily species within the Latrodectus genus, are remarkably widespread across the United States. mactans) is primarily found throughout the southeastern states, extending as far north as Ohio and west into Texas, Oklahoma, and Kansas. The United States is home to three main black widow species. The southern black widow dominates the southeastern United States from Florida to Texas, thriving in warm, humid climates. If you've been wondering exactly where Latrodectus mactans lives — and whether your state falls within The Western Black Widow (Latrodectus hesperus) inhabits western North America, from British Columbia to Manitoba and across western U. Their populations are most concentrated in the warm, arid regions of the South and West. state except Alaska. Log in to make states, months and boxes clickable. The female's body is 14–16 mm (1/2 in) in length and is black, often with an hourglass-shaped red mark on the lower abdomen. This "hourglass" mark can be yellow, and on rare occasions, white. The spider genus Latrodectus includes the widely known black widows, notorious because of the extreme potency of their neurotoxic venom. Based on collected data, the geographic range for Latrodectus hesperus includes 1 countries and 10 states in the United States. Biogeographic Regions nearctic nearctic native Habitat Black widow spiders live under ledges, rocks, plants, and different types of debris. The presence of black widow spiders across the United States varies significantly from state to state, with different species inhabiting different regions. The Southern Black Widow (L. Below, we break down each species’ range, the states where populations are densest, and what’s changing on the map right now. Among the most common species are the Southern Black Widow (Latrodectus mactans), Northern Black Widow (Latrodectus variolus), and Western Black Widow (Latrodectus hesperus). Latrodectus hesperus spiders have been sighted 52 times by contributing members. Its range runs from southern British Columbia and the prairie provinces of Canada south through Washington, Oregon, California, Nevada, Utah, Arizona, Colorado and New Mexico into western Texas and northern Mexico. This species can be found in all four of the deserts of the American southwest. swhm, itf3f, wm3, 6315y, ryc, ljryd, qeh, 2cgw, xdc, jwyt,