Spotted Orb-Weaver, Barn Spider
Neoscona crucifera
Araneidae (Orb-Weavers), Order Araneae. Key family characteristics include building vertical circular webs, having eight similar-sized eyes in a compact cluster, and utilizing heavy spination on the legs.
Physical Description
Robust body with a swollen, oval-shaped abdomen and a smaller, hairy cephalothorax. The abdomen features subtle folium markings and distinct paired spots. Females are notably larger and more robust than males.
Size Estimate
Body length ranges from 10 to 18 millimeters for adult females, with a leg span of approximately 3 to 4 centimeters. This appears to be a mature adult female specimen.
Coloration & Markings
Warm reddish-brown to yellowish-orange base coloration. The abdomen displays a lighter central band bordered by darker spots, and the legs are heavily banded with alternating dark and light segments.
Web Type
Vertical orb web constructed at night, typically measuring 1 to 2 feet in diameter. It is often built near outdoor lighting, porches, or gardens to capture flying nocturnal insects.
Eye Arrangement
Eight eyes arranged in two rows of four on a slightly raised cephalothorax tubercle, typical of the Araneidae family, with lateral eyes often grouped in pairs.
Leg Characteristics
Long, strong legs covered with prominent, stiff spines and distinct dark banding. The legs are held in a sprawling posture typical of resting orb-weavers.
Venom & Safety Information
Venom Information
Low toxicity neurotoxin designed strictly to immobilize small insect prey. Harmless to humans.
Medical Significance
Not medically significant. A bite may cause minor, localized pain or redness similar to a mild mosquito bite, which subsides quickly without treatment.
Safety Recommendations
No special safety measures required. If found indoors, gently guide the spider into a cup and release it outdoors. Avoid handling bare-handed only to prevent startling it.
Habitat & Behavior
Habitat & Range
Found throughout North America and parts of Asia and Europe. Prefers gardens, woodlands, forests, and the exterior walls of buildings near lights that attract prey.
Behavior & Temperament
Docile and non-aggressive. Spiders typically retreat to a nearby relay retreat or hang head-down in the center of the web during the night, hiding in crevices by day.
Diet & Prey
Primarily nocturnal flying insects including moths, beetles, mosquitoes, and flies captured in the vertical orb web.
Seasonal Activity
Most active and visible during late summer and autumn when adults reach maximum size and females produce egg sacs before winter.
Description
The Spotted Orb-Weaver is a familiar and welcome garden guest, renowned for its impressive nighttime web-building skills. With a warm reddish-brown body and distinctively banded legs, this master architect spends its nights suspended in a delicate wheel of silk, waiting patiently for passing moths and beetles. By day, it often retires to a sheltered corner, making it a peaceful and beneficial neighbor that helps control insect populations around homes and gardens.
Key Features
Reddish-brown hairy body, distinct abdominal spotting, heavily spined and banded legs, and the construction of large vertical orb webs.
Similar Species
Cross Orb-Weaver (Araneus diadematus), which features a prominent white cross pattern on the abdomen instead of spots.
Life Cycle
Females lay eggs in a protective silken cocoon attached to bark or structures in autumn. Spiderlings hatch in spring, undergo multiple molting stages, and reach maturity by late summer.
Ecological Importance
Acts as an effective natural predator of pest insects such as mosquitoes and agricultural pests, serving as an important link in the garden food web.
Conservation Status
Secure and widespread, with stable populations facing no significant conservation threats.
Interesting Facts
Spotted Orb-Weavers often consume and rebuild their entire orb webs every single night to maintain the stickiness and integrity of the silk traps.
Photography Tips
Photograph from the side or top during early morning or evening when lighting is soft. Use a macro lens to capture the fine spination on the legs and the abdominal patterns.
Identified: 2026-09-22T16:12:55.095231