Spotted Orb-Weaver, Barn Spider
Neoscona crucifera
Araneidae (Orb-Weavers), Order Araneae. Characterized by building vertical, wheel-like orb webs and having eight eyes arranged in two rows.
Physical Description
Robust body with a rounded, hairy, somewhat bulbous abdomen and a distinct, smaller cephalothorax. Shows typical sexual dimorphism with females being significantly larger and more robust than males.
Size Estimate
Body length ranges from 9 to 19 mm for females and 8 to 13 mm for males, with a total leg span reaching up to 3 to 4 cm. This specimen appears to be an adult or sub-adult.
Coloration & Markings
Variable base coloration ranging from reddish-brown, orange-brown, to yellowish-tan. The abdomen typically features a distinct patterned folium or cross-like markings with darker borders and white spots.
Web Type
Vertical orb web constructed at night, featuring a sticky spiral and a central hub where the spider typically waits upside down. Often built near outdoor lights, porches, or gardens.
Eye Arrangement
Eight small eyes arranged in two horizontal rows on the anterior portion of the cephalothorax, typical of the orb-weaver family Araneidae.
Leg Characteristics
Long, moderately thick legs featuring distinct dark banding or rings, covered in fine setae and spines, held in a typical splayed resting posture.
Venom & Safety Information
Venom Information
Neurotoxic venom used primarily to immobilize insect prey. It is of low potency to humans and not medically significant.
Medical Significance
Harmless to humans. A bite may cause minor, localized pain, redness, or swelling similar to a mild bee sting, subsiding quickly without medical treatment.
Safety Recommendations
Simply leave the spider alone if found outdoors. If found inside a home or undesirable location, gently coax it into a container and release it outdoors.
Habitat & Behavior
Habitat & Range
Found throughout North America, particularly east of the Rocky Mountains. Prefers gardens, woodland edges, meadows, and human structures like exterior walls and porches.
Behavior & Temperament
Docile and non-aggressive. Nocturnal hunters that spend daytime hiding near the web or retreating to nearby crevices, only biting if directly squeezed or trapped against skin.
Diet & Prey
Generalist predator feeding on flying insects such as moths, beetles, flies, and mosquitoes trapped in its sticky orb web.
Seasonal Activity
Most active and noticeable during late summer and autumn when females reach maximum size, build large webs, and prepare egg sacs before dying off with the first hard frosts.
Description
The Spotted Orb-Weaver is a familiar and beneficial garden resident known for constructing large, intricate wheel-shaped webs. With its warm reddish-brown tones and patterned abdomen, it is a quintessential autumn orb-weaver often spotted near outdoor lighting catching nocturnal insects.
Key Features
Hairy, rounded abdomen with variable brownish-orange coloration and a patterned dorsal marking, combined with banded legs and typical vertical orb-web construction.
Similar Species
Araneus diadematus (European Garden Spider), which features distinct white spots forming a cross on the abdomen, and Neoscona domiciliorum (Redaductus), distinguished by brighter reddish hues.
Life Cycle
Females produce papery egg sacs in autumn containing hundreds of eggs, which overwinter before spiderlings hatch in spring. Undergoes multiple molts to reach maturity by late summer.
Ecological Importance
Serves as an important natural pest control agent by consuming large quantities of flying agricultural pests and mosquitoes, while providing food for birds and small mammals.
Conservation Status
Secure and widespread, with stable populations facing no significant conservation threats.
Interesting Facts
Many orb-weavers consume and recycle their own webs nightly to recover proteins used in silk production before spinning a fresh web.
Photography Tips
Use macro lenses with a fast shutter speed or ring flash in low light or at dusk. Photograph from the side or slightly above to capture the dorsal abdominal patterns clearly without disturbing the spider.
Identified: 2026-08-30T15:09:44.508075