Barn Orb-Weaver, Hentz Orb-Weaver
Neoscona crucifera
Araneidae (Orb-Weavers), Order Araneae. Key family characteristics include building vertical wheel-shaped webs and having eight eyes arranged in two rows.
Physical Description
The spider has a bulky, rounded abdomen, a distinct cephalothorax covered in fine hairs, and prominent spinnerets. Females are noticeably larger and more robust than males.
Size Estimate
Body length ranges from 9 to 19 mm for females and 8 to 15 mm for males, with a total leg span reaching up to 30 to 40 mm.
Coloration & Markings
Variable coloration ranging from light yellow-brown, orange-brown, to reddish or dark brown. The abdomen typically features a distinct leaf-like pattern or cross markings, sometimes accompanied by light and dark spots or lateral bands.
Web Type
Vertical orb web constructed with sticky spiral threads, typically built near lights on building exteriors, porches, and garden walls to catch flying insects.
Eye Arrangement
Eight eyes arranged in two slightly curved rows, with the lateral eyes often touching or closely grouped, typical of the orb-weaver family Araneidae.
Leg Characteristics
Long, strong legs featuring distinct dark and light banding, covered in fine hairs and prominent spines used for navigating the web and subduing prey.
Venom & Safety Information
Venom Information
Neurotoxic and proteolytic venom designed specifically to immobilize small invertebrate prey. It poses no chemical threat to humans.
Medical Significance
Not medically significant. Bites are extremely rare, usually only occurring if the spider is directly trapped or squeezed against the skin, resulting in mild, localized pain and minor swelling similar to a mosquito bite.
Safety Recommendations
No special safety measures are required. If one is found inside the house, gently capture it under a glass and release it outdoors near exterior lighting.
Habitat & Behavior
Habitat & Range
Found widely across North America, commonly inhabiting human-made structures such as brick walls, porches, fences, as well as gardens, woodlands, and fields.
Behavior & Temperament
Nocturnal hunters that often sit at the center of their webs or retreat to a nearby hiding spot during the day. Generally docile, non-aggressive, and quick to retreat when disturbed.
Diet & Prey
Feeds primarily on nocturnal flying insects including moths, mosquitoes, beetles, and midges trapped in its vertical orb web.
Seasonal Activity
Most active and noticeable during late summer and autumn when adults reach maximum size, build large webs, and engage in mating before dying off with the first winter frosts.
Description
The Barn Orb-Weaver is a familiar nocturnal architect often found building its wheel-shaped webs near porch lights and brick walls. With its patterned, bulbous abdomen and gentle temperament, it serves as a wonderful, harmless neighbor that naturally helps control flying insect populations around human dwellings.
Key Features
Hairy, robust body, distinct dorsal folium or cross pattern on the abdomen, vertical orb web structure, and a nocturnal habit of resting on or near buildings.
Similar Species
Neoscona domiciliorum (Spotted Orb-Weaver) and Araneus diadematus (Cross Orb-Weaver). Distinguished by subtle variations in the abdominal markings, coloration, and precise habitat preferences.
Life Cycle
Females construct silken egg sacs in sheltered crevices during autumn, containing hundreds of eggs. Spiderlings emerge in spring, dispersing via ballooning before growing through multiple molting stages over a single year.
Ecological Importance
Acts as an effective biological control agent by consuming large quantities of pest insects, mosquitoes, and agricultural pests, while serving as prey for birds and wasps.
Conservation Status
Not evaluated by the IUCN, but populations are stable, widespread, and abundant throughout its natural range.
Interesting Facts
Barn orb-weavers are notorious for dismantling and rebuilding their large orb webs almost every single night to maintain the stickiness of the silk capture threads.
Photography Tips
Best photographed at night using a macro lens and an off-camera flash to highlight the intricate details of the web and the spider's dorsal markings against a dark background.
Identified: 2026-10-01T10:08:55.653389