Spotted Orb-Weaver, Hentz Orb-Weaver
Neoscona crucifera
Family Araneidae (Orb-Weavers), Order Araneae. Characterized by building vertical wheel-shaped webs and having eight similar-sized eyes in a compact cluster.
Physical Description
The spider exhibits a robust body with a distinctively large, bulbous, oval-to-triangular abdomen that often overhangs the cephalothorax. The cephalothorax is smaller, hairy, and brownish. Females are significantly larger than males, displaying typical araneid sexual dimorphism.
Size Estimate
Body length ranges from 9 to 19 mm for adult females, with a leg span reaching up to 40 to 50 mm. The specimen shown appears to be a mature, robust female.
Coloration & Markings
Base coloration ranges from light brown, yellowish, reddish-brown to dark gray. The dorsal abdomen features a variable pattern, often including a distinct central leaf-like folium or scalloped markings, accompanied by faint or bright spots along the edges.
Web Type
Constructs a classic, large, vertical orb web made of sticky capture spiral threads and non-sticky structural radii, typically built in open spaces between structures, porches, or foliage.
Eye Arrangement
Features eight eyes arranged in two compact rows on a raised anterior tubercle of the cephalothorax, typical of orb-weavers, consisting of four central median eyes and two pairs of lateral eyes.
Leg Characteristics
Legs are moderately long, robust, and visibly banded with dark brown and light tan rings, heavily armed with spines to help subdue struggling prey caught in the web.
Venom & Safety Information
Venom Information
Possesses mild neurotoxic venom used strictly to immobilize insect prey. It is not specialized for vertebrate defense.
Medical Significance
Not medically significant. A bite may cause minor, localized pain, redness, or swelling similar to a mosquito bite, but they rarely bite humans unless firmly trapped against the skin.
Safety Recommendations
Leave the spider alone to perform natural pest control. If it must be moved from a doorway, gently guide it into a container using a piece of card and relocate it to nearby shrubbery.
Habitat & Behavior
Habitat & Range
Found widely across North America, particularly in the eastern and central regions. Prefers exterior walls of buildings, porches, gardens, and forest edges where artificial lighting attracts nightly flying insects.
Behavior & Temperament
Nocturnal web-builders that often hide in a retreat or hang head-down in the center of the web at night. They are docile, timid, and non-aggressive, retreating quickly when disturbed.
Diet & Prey
Feeds primarily on nocturnal flying insects such as moths, beetles, mosquitoes, and midges trapped in the vertical orb web.
Seasonal Activity
Most active and commonly observed during late summer and autumn when females reach full adult size and construct egg sacs.
Description
The Spotted Orb-Weaver is a familiar and beneficial backyard guest, often setting up elaborate wheel-shaped webs near porch lights. With its bulbous, patterned abdomen and nocturnal habits, it acts as a master pest controller, quietly eliminating countless flying insects around human dwellings during the warmer months.
Key Features
Large, bulbous, hairy abdomen with a variable dorsal folium pattern, brownish-red coloration, and the construction of a large vertical wheel-shaped orb web in nocturnal settings.
Similar Species
Neoscona arabesca (Arabesque orb-weaver), which tends to be slightly smaller with more distinct abdominal patterns, and Araneus cavaticus (Barn spider), which features a paler, hairy abdomen.
Life Cycle
Annual life cycle. Females construct papery egg sacs in sheltered cracks or vegetation in autumn, depositing hundreds of eggs before perishing in the cold weather. Spiderlings hatch in spring.
Ecological Importance
Serves as an important natural predator of flying insect populations, helping regulate pest numbers in gardens and around homes while serving as prey for birds and wasps.
Conservation Status
Secure and widespread throughout its natural geographic range, with stable populations facing no significant threats.
Interesting Facts
Spotted Orb-Weavers often consume and rebuild their entire orb webs nightly to maintain stickiness and structural integrity, recycling the silk proteins in the process.
Photography Tips
Photograph at night using a flash to illuminate the intricate details of the web and the dorsal patterns of the spider while it sits stationary in the hub.
Identified: 2026-09-21T23:32:23.605039