Barn Spider, Hentz Orb-Weaver
Neoscona crucifera
Araneidae (Orb-Weavers), Order Araneae. Key family characteristics include building vertical wheel-shaped webs, having eight similar-sized eyes in two rows, and possessing robust bodies with distinct abdominal patterns.
Physical Description
Robust body shape featuring a hairy or velvety texture. The cephalothorax is typically brownish and covered in fine setae, while the large, bulbous abdomen is somewhat oval to triangular, often displaying distinct folium patterns or humps near the front.
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 40 to 50 mm. The specimen shown appears to be a mature female of typical adult size.
Coloration & Markings
Variable base coloration ranging from light yellow-brown to reddish-orange or dark brown. The dorsal abdomen often features a distinctive, leaf-like pattern (folium) bordered in darker tones, sometimes accompanied by a series of paired spots or a central pale cross-like marking.
Web Type
Builds a large, vertical orb web characterized by sticky spiral lines and a non-sticky structural frame. The web is often constructed in open spaces near artificial lights, porches, or structures to catch flying insects.
Eye Arrangement
Eight eyes arranged in two distinct rows on the anterior portion of the cephalothorax, consisting of four central median eyes and two lateral pairs on each side, typical of the orb-weaver family.
Leg Characteristics
Long, robust legs featuring distinct dark and light banding patterns. Spines are prominent along the segments, and the legs are typically held outstretched in a sprawling stance when resting at the hub of the web.
Venom & Safety Information
Venom Information
Contains mild neurotoxic and proteolytic venom tailored strictly for subduing insect prey. It poses no chemical threat to humans or larger mammals.
Medical Significance
Harmless to humans. A bite is rare and typically only occurs if the spider is squeezed or trapped against the skin, resulting in minor localized pain, redness, or swelling comparable to a mild bee sting.
Safety Recommendations
Leave undisturbed to benefit from natural pest control. If relocation is necessary, gently guide the spider into a container using a piece of card and release it into a nearby garden or wooded area.
Habitat & Behavior
Habitat & Range
Found widely across North America, particularly in eastern and central regions. Prefers woodland edges, gardens, and human-made structures such as porches, barns, and exterior walls where outdoor lighting attracts nighttime prey.
Behavior & Temperament
Nocturnal hunters that typically retreat to a nearby hiding spot or hang quietly at the center of the orb web during the night. They are non-aggressive, docile, and usually drop from the web or retreat when disturbed.
Diet & Prey
Feeds primarily on flying nocturnal insects including moths, mosquitoes, beetles, and midges caught in the sticky spiral of the orb web.
Seasonal Activity
Most active and noticeable during late summer and autumn when females reach full adult size and construct prominent webs.
Description
The Barn Spider is a master architect of the night, spinning large and intricate wheel-shaped webs near structural light sources to intercept flying insects. With its warm reddish-brown hues and elaborate abdominal patterns, it is a fascinating and beneficial neighbor around homes and gardens.
Key Features
Large bulbous abdomen with variable leaf-like or cross-like markings, nocturnal presence at the center of a large vertical orb web, and distinctly banded legs.
Similar Species
Other orb-weavers such as Neoscona domiciliorum (Red-legged Orb-Weaver) and Araneus cavaticus (Barn Spider proper in northern regions), distinguished primarily by subtle variations in abdominal patterns and leg coloration.
Life Cycle
Mating occurs in late summer and autumn, after which females deposit eggs in a silk-wrapped sac hidden in protected crevices. Spiderlings emerge in spring, dispersing via ballooning before maturing through a series of molts.
Ecological Importance
Acts as an effective natural pest control agent by consuming large quantities of flying insects, mosquitoes, and agricultural pests.
Conservation Status
Not evaluated by the IUCN, but populations are secure, widespread, and highly adaptable to human-altered environments.
Interesting Facts
Barn spiders frequently consume and rebuild their entire orb webs every single night to maintain the stickiness and integrity of the silk structure.
Photography Tips
Best photographed at night using a macro lens and ring flash or off-camera lighting to highlight the intricate patterns on the abdomen and the fine structure of the orb web against a dark background.
Identified: 2026-09-02T16:01:11.546571