Marbled Orb-Weaver, Pumpkin Spider
Araneus marmoreus
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 Marbled Orb-Weaver features a compact, bulbous, and rounded abdomen that is exceptionally large, especially in gravid females. The cephalothorax is relatively small compared to the massive abdomen. The body texture appears smooth yet glossy with fine hairs.
Size Estimate
Body length typically ranges from 9 to 20 mm for females, with males being smaller at around 6 to 9 mm. The leg span is roughly 25 to 40 mm.
Coloration & Markings
Characterized by a bright, vibrant yellow, orange, or whitish-yellow background on the abdomen, overlaid with intricate brown, black, or marbled dark patterns. Some individuals exhibit a dark patch on the rear end of the abdomen.
Web Type
Builds a classic vertical orb web, often constructed among low vegetation, shrubs, or near structures. They typically create a retreat of rolled leaves near the edge of the web.
Eye Arrangement
Eight eyes arranged in two rows of four, with the lateral eyes often touching or closely grouped, typical of the orb-weaver family Araneidae.
Leg Characteristics
Legs are relatively long and robust, displaying distinct banding patterns with dark brown and light orange or whitish segments, often featuring fine spines.
Venom & Safety Information
Venom Information
Possesses mild neurotoxic venom used primarily to immobilize insect prey. It is not considered dangerous or medically significant to humans.
Medical Significance
Harmless to humans. A bite is extremely rare and typically only occurs if the spider is squeezed or trapped against the skin, resulting in mild, localized pain and minor swelling similar to a bee sting.
Safety Recommendations
No special safety precautions are needed as they pose no threat. If found indoors, gently relocate them outside using a cup and a piece of card.
Habitat & Behavior
Habitat & Range
Found widely across North America and Europe, typically inhabiting moist woodlands, forest edges, gardens, and overgrown fields containing tall herbaceous plants and shrubs.
Behavior & Temperament
Generally non-aggressive and docile. They spend daylight hours hiding in their leaf retreat and sit in the center of their orb web during the evening and night.
Diet & Prey
Feeds primarily on flying insects caught in its orb web, including mosquitoes, flies, moths, beetles, and small wasps.
Seasonal Activity
Most active and visible during late summer and autumn when individuals reach their maximum adult size and mate.
Description
The Marbled Orb-Weaver is one of the most visually striking orb-weavers, easily recognized by its large, pumpkin-like, brightly colored abdomen adorned with dark marbled patterns. As a master architect of the night, it constructs intricate wheel-shaped webs to capture nocturnal flying insects, serving as a beneficial predator in gardens and woodlands.
Key Features
Extremely large, bulbous, brightly colored yellow or orange abdomen with dark marbled or leaf-like patterning, paired with distinctly banded legs.
Similar Species
Can be confused with other Araneus species, such as Araneus diadematus (Cross Orb-Weaver), which features a white cross pattern rather than marbled markings.
Life Cycle
Females lay eggs in a silken sac hidden in protected vegetation or bark during autumn. Spiderlings hatch in spring, molt multiple times throughout the summer, and reach adulthood by late autumn.
Ecological Importance
Acts as a natural pest control agent by consuming large quantities of flying agricultural and garden pests, while also serving as a food source for birds and small mammals.
Conservation Status
Not evaluated by the IUCN, but populations are stable, widespread, and common across their natural range.
Interesting Facts
The common nickname 'Pumpkin Spider' stems from both its bright orange coloration and its peak appearance around Halloween. Females can change color intensity slightly depending on background conditions.
Photography Tips
Best photographed during late afternoon or evening when they occupy the center of their web. Use a macro lens, soft natural lighting or a diffused flash, and maintain a safe distance to avoid disturbing the web.
Identified: 2026-10-14T17:40:00.431995