THE INSECTLIBRARY FIELD GUIDES
Barn SpiderIdentification, facts & practical guidance
The name barn spider usually refers to Araneus cavaticus in North America. A spider on a barn can belong to many other species.
Compiled by the InsectLibrary Team · Updated · Editorial policy
Identification and lookalikes
Start by recording the orb web, the abdomen from above and below, and the locality. Many Araneus species have mottled brown patterns, so the building where the spider lives is not a diagnostic feature.
Barn spiders and orb weavers
This species belongs to Araneidae. Broad orb-weaver biology can help explain the capture web, but measurements and markings from another Araneus species should not be used as a definitive identification.
What to do next
Use the linked regional spider reference and a detailed photograph for comparison. If distinguishing features are not visible, retain the identification as an orb weaver rather than forcing a species name.
Barn Spider: species profile
Explore the species profile covered by this guide, with recorded names and available photos.
Sources and further reading
- extension.umaine.edu - spidershttps://extension.umaine.edu/home-and-garden-ipm/fact-sheets/spiders/
References support the subject discussed here; they do not certify every imported directory record. Regional sources describe their own locations. Read our source and correction policy.