Arachnid · GBIF taxon 2159817
Barn Orbweaver
Araneus cavaticusAlso known as Barn Spider, North American Barn Spider
Barn orbweavers are nocturnal master architects best known for constructing large, intricate spiral webs on wooden structures, porches, and forest edges. Each evening, these heavy-bodied spiders rebuild their sticky traps to capture nocturnal flying insects, often consuming the silk before dawn to recycle its nutrients. Their rusty yellow and brown coloration with cryptic abdominal markings provides excellent camouflage against weathered barn wood during daylight hours.
NocturnalWeb BuilderBeneficial
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Moths
- Flies
- Mosquitoes
Predators
- Birds
- Mud dauber wasps
- Lizards
ThreatsPesticide application and deliberate human destruction of webs
HabitatsBarns, sheds, porches, eaves, wooden human structures, and forest edges
Life span1 year
Size / weightNot available
Classification
- FamilyAraneidae
- SpeciesAraneus cavaticus
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance.
Responsible observation
- Nighttime Viewing: Look near outdoor porch lights after dark, where spiders sit centered in their webs waiting for insects.
- Web Respect: Avoid breaking the thick anchor lines that secure the web to eaves, walls, or tree branches.
- Pest Control Coexistence: Leave spiders undisturbed on exterior walls to help reduce local mosquito and moth populations.
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