Spotted Orb-Weaver, Hentz Orb-Weaver
Neoscona crucifera
Araneidae (Orb-Weavers), Order Araneae
Physical Description
The spider has a robust, rounded abdomen typical of orb-weavers and a smaller, hairy cephalothorax. The body texture is covered in fine setae, and sexual dimorphism is prominent, with females significantly larger and more bulbous than males.
Size Estimate
Body length ranges from 10 to 18 mm for females and slightly smaller for males, with a total leg span reaching up to 30 to 40 mm.
Coloration & Markings
Coloration varies widely from light tan, orange-brown, to dark reddish-brown. The abdomen often features a distinct leaf-like or cross-like pattern, though markings can be variable.
Web Type
Constructs a classic vertical orb web consisting of sticky spiral threads and non-sticky structural radii, typically built at night in open spaces, gardens, or near outdoor lighting.
Eye Arrangement
Eight small eyes arranged in two rows of four, typical of the Araneidae family, with lateral eyes often grouped together.
Leg Characteristics
Long, strong legs adorned with prominent spines and distinct dark banding patterns, often held wide to monitor vibrations on the web.
Venom & Safety Information
Venom Information
Neurotoxic and proteolytic venom designed strictly to immobilize small invertebrate prey. It poses no medical threat to humans.
Medical Significance
Harmless to humans. A defensive bite may cause mild, localized pain, redness, or swelling similar to a mosquito bite, requiring no special medical treatment.
Safety Recommendations
Leave them undisturbed to benefit from natural pest control. If relocation is necessary, gently guide the spider into a container using a piece of paper.
Habitat & Behavior
Habitat & Range
Found throughout North America, preferring gardens, woodlands, and human structures such as porches and exterior walls where flying insects gather near lights.
Behavior & Temperament
Nocturnal web-builders that typically hide in a retreat or hang head-down in the center of the web at night. They are docile and rarely bite unless accidentally trapped or heavily pressured.
Diet & Prey
Feeds primarily on flying insects such as moths, beetles, mosquitoes, and flies caught in the vertical orb web.
Seasonal Activity
Most active and noticeable during late summer and autumn when adults reach maximum size and females prepare egg sacs.
Description
The Spotted Orb-Weaver is a common and beneficial nocturnal hunter known for constructing intricate wheel-shaped webs. As autumn approaches, these spiders become prominently visible on porches and gardens as they reach full adult size.
Key Features
Rounded, hairy abdomen with varied brownish leaf-patterns, construction of a large vertical orb web, and nocturnal habits.
Similar Species
Other orb-weavers such as Araneus diadematus (Cross Orb-Weaver), distinguished by a distinct white cross pattern on the abdomen.
Life Cycle
Females produce papery egg sacs in autumn containing hundreds of eggs. Spiderlings emerge in spring, disperse via ballooning, and mature by late summer or autumn.
Ecological Importance
Acts as an effective natural pest control agent by consuming large quantities of flying agricultural and household insect pests.
Conservation Status
Not evaluated by the IUCN, but populations are stable, widespread, and common across their native range.
Interesting Facts
Many orb-weavers consume and recycle their entire web daily to recover proteins used in silk production before spinning a fresh one at dusk.
Photography Tips
Use a macro lens with a flash or external light source at night when the spider is active in the center of its web for the best contrast and clarity.
Identified: 2026-08-02T06:16:05.045870