Barn Spider, Hentz Orb-Weaver
Neoscona crucifera
Araneidae (Orb-Weavers), Order Araneae. Key family characteristics include building vertical wheel-shaped webs, having eight similar eyes, and possessing three claws on the tarsi.
Physical Description
Robust, hairy body with a distinctively large, bulbous, oval-shaped abdomen and a smaller cephalothorax. Females are significantly larger and bulkier than males. The exoskeleton features visible fine setae (hairs).
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 35 to 50 mm. The specimen shown appears to be a medium-sized adult or a subadult.
Coloration & Markings
Variable base coloration ranging from light yellow-brown, orange, reddish-brown to dark gray. The dorsal abdomen features a distinctive folium (leaf-like pattern) bordered by dark lines, often accompanied by pale spots or a central cross/cheesecake marking.
Web Type
Vertical orb web constructed with sticky spiral threads and a non-sticky structural frame. Webs are typically built at night in open spaces, near outdoor lighting, or attached to man-made structures like walls and porches.
Eye Arrangement
Eight eyes arranged in two rows of four (four median eyes forming a central square, flanked by two pairs of lateral eyes). Typical of the orb-weaver family.
Leg Characteristics
Long, strong legs with prominent dark and light banding, covered in numerous spines and hairs. When resting in the center of the web, the legs are typically held extended in pairs.
Venom & Safety Information
Venom Information
Contains neurotoxic components typical of araneids, but the venom is weak and evolved primarily to immobilize small insect prey. It poses no threat to humans.
Medical Significance
Harmless to humans. A bite may cause mild, temporary localized pain, minor swelling, or redness similar to a mosquito bite, requiring no special medical treatment.
Safety Recommendations
No special safety measures needed. If found indoors or in an inconvenient location, gently guide the spider into a cup using a piece of paper and release it outdoors.
Habitat & Behavior
Habitat & Range
Found across North America, particularly the eastern and central regions. Prefers woodland edges, gardens, and the exterior walls of buildings where artificial lights attract flying insect prey.
Behavior & Temperament
Nocturnal web-weavers that often retreat to a nearby crevice or leaf shelter during daylight hours, though they may sit in the web center at night. Docile and non-aggressive toward humans, typically dropping or retreating when disturbed.
Diet & Prey
Generalist predator feeding on flying nocturnal insects such as moths, beetles, mosquitoes, and flies captured in their sticky orb webs.
Seasonal Activity
Most active during late summer and autumn when individuals reach full adult size and mating occurs. Overwinters in the egg stage.
Description
The Barn Spider is a familiar and beneficial nocturnal neighbor, frequently spotted spinning its magnificent wheel-shaped web near outdoor lights. With its warm reddish-brown tones and intricate abdominal markings, it is a quintessential orb-weaver that serves as an expert insect hunter around homes and gardens.
Key Features
Bulbous, hairy abdomen with a distinct folium pattern; preference for vertical orb webs near human structures; nocturnal habits; prominent leg banding.
Similar Species
Cross Orb-Weaver (Araneus diadematus), which features a prominent white cross on the abdomen; other Neoscona species, distinguished by subtle epigyne and ventral coloration differences.
Life Cycle
Females construct tough, silken egg sacs in sheltered cracks or vegetation in the autumn, depositing hundreds of eggs. Spiderlings emerge in spring, dispersing via ballooning. Lifespan is typically one year, ending with the first hard frosts.
Ecological Importance
Acts as an effective natural pest control agent by consuming large numbers of flying insects, particularly mosquitoes, moths, and agricultural pests.
Conservation Status
Not evaluated by the IUCN, but populations are secure, abundant, and widespread across their native range.
Interesting Facts
Barn spiders frequently consume and rebuild their entire orb webs every single night to maintain the stickiness of the silk. They are famously depicted in children's literature, such as E.B. White's 'Charlotte's Web'.
Photography Tips
Use a macro lens with a flash to capture fine details of the abdominal pattern and leg spination. Night photography is ideal when the spider is active in its web.
Identified: 2026-09-30T23:55:59.617283