Version June 2024
| Where they are found in the world | Common name/species name | What they look like | Where they live |
| Widows | |||
| Southeastern US (Maryland, Southern Ohio, and lower states) | Southern black widow L. mactans | Shiny black spider with some form of red on the body | Clutter around homes, gardens, sheds, garages Rarely indoors |
| Western half of the US from Canada to Mexico | Western black widow L. hesperus | ||
| New Zealand (coastal areas) Australia (coastal areas) Japan (Osaka prefecture) | Australian red back L. hasselti | Shiny black body with red stripe on the back | |
| South America | L. curacaviensis | ||
| Mediterranean | Black hag, black wolf L. tredecimguttatus | 13 red dots on the back of the body No red hourglass | |
| Worldwide and in the US (from South Carolina to Texas and California) | Brown widow L. geometricus (Can bite humans, but mild) | White stripes on a tan body with orange hourglass Can vary a lot in color, from cream to almost black | |
| False black widows | |||
| US: Pacific coast and Colorado Canada: British Columbia Australia | False black widow S. grossa | Similar shape to widows Chocolate brown color with tan stripes or markings on the body Do not have red markings | Clutter around homes Also indoors (in cupboards and other dark, quiet places) |
| Europe | S. paykulliana S. grossa | ||
| Recluses | |||
| US: Midwest and Southern states extending westward | Brown recluse L. reclusa | Ordinary-looking brown spiders 3 pairs of eyes (6 total) The body and legs are the same color The legs have very fine hairs | Mostly inside homes: attics, basements, cupboards Outdoors: in rock piles and under tree bark, not in live plants |
| Worldwide inside buildings | Mediterranean recluse L. rufescens | ||
| South America (Brazil, Chile, others) | Chilean recluse L. laeta L. intermedia L. gaucho | ||
| Isolated reports in South Africa, Australia | |||
| Phoneutria | |||
| South America | Brazilian wandering spider P. nigriventer P. keyserlingi P. fera | Large (almost 4-inch [95-millimeter] leg span) Very hairy | Might hide under household items during the day Found in cities in piles of clutter, trees and other plants, or garbage |
| Australian funnel web | |||
| Australia: Southeastern coastal regions (including Sydney and Brisbane) | Australian funnel web spider A. robustus 5 species of Hadronyche | Large spider (1-inch [25-millimeter] body) Shiny black body | Moist areas, such as basements |
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