Cross Orbweaver, European Garden Spider, Crowned Orb Weaver, Diadem Spider
Araneus diadematus
Family Araneidae (Orb-weavers), Order Araneae. Characterized by building geometric spiral wheel-shaped webs.
Physical Description
Robust, bulbous abdominal shape with a slightly flattened oval to sub-triangular silhouette. Cephalothorax is smaller, covered in fine setae. Distinctive cross-like pattern on the dorsal abdomen formed by white spots and spots.
Size Estimate
Body length approx. 6-13 mm (male) or 10-20 mm (female). Based on siding scale, this individual is likely a small adult or sub-adult around 8-12 mm with leg span under 25 mm.
Coloration & Markings
Varies from pale yellowish-tan, orange-red, to dark brownish-grey. Possesses a white or yellow cross-shaped marking composed of small specks on the upper side of the abdomen, accompanied by alternating dark brown and pale chevrons.
Web Type
Classic orb-web with radial threads and sticky spiral spirals. Built vertically near outdoor structures, garden foliage, window frames, or house siding.
Eye Arrangement
Eight eyes arranged in two curved rows; four central eyes form a small trapezoid/quadrangle, flanked by two lateral pairs on each side.
Leg Characteristics
Medium-length legs covered in prominent spines (macrosetae) and visible dark/light alternating bands (annulations).
Venom & Safety Information
Venom Information
Mild, localized venom used to immobilize small insect prey. Not hazardous or dangerous to humans.
Medical Significance
Harmless to humans. Bites are rare and only occur if directly crushed or handled roughly; symptoms are comparable to a mild, localized bee sting or mosquito bite.
Safety Recommendations
No action needed. If inconveniently located on siding or doors, gently relocate using a cup and card to a nearby shrub or garden area.
Habitat & Behavior
Habitat & Range
Widespread across North America and Europe. Frequently found around human habitations, gardens, woodland edges, fences, and outer walls of houses.
Behavior & Temperament
Docile and non-aggressive. Spends day waiting at the center of web or in a nearby silk retreat connected by a signal line. Responds to vibration by wrapping prey or retreating.
Diet & Prey
Generalist predator feeding on flying insects including flies, mosquitoes, wasps, moths, and aphids captured in its web.
Seasonal Activity
Most noticeable during late summer and autumn (August-October) when adults reach full size and construct prominent webs.
Description
The Cross Orbweaver (Araneus diadematus) is a classic garden spider renowned for its iconic cross pattern on the abdomen and intricate geometric webs. Often seen perched on siding or foliage during late summer and autumn, it serves as an excellent natural pest controller around homes.
Key Features
Distinctive white cross marking on dorsal abdomen, banded legs with macrosetae, rounded triangular abdominal shape, vertical spiral orb web.
Similar Species
Larinioides patagiatus (Furrow Orbweaver), Araneus cavaticus (Barn Spider), Neoscona crucifera (Hentz Orbweaver). Distinguished mainly by the precise cross-shaped dorsal white spot array.
Life Cycle
Females lay hundreds of eggs in yellow silk sacs during autumn, then die before winter. Spiderlings hatch in spring, disperse via ballooning, and mature by late summer.
Ecological Importance
Highly beneficial natural controller of flying pest populations, reducing numbers of mosquitoes, flies, and plant pests around gardens and structures.
Conservation Status
Least Concern (Unassessed internationally, but common, widespread, and stable population trends globally).
Interesting Facts
Females often consume their own web every evening and recycle the proteins by ingesting the silk before rebuilding a fresh web.
Photography Tips
Focus on the dorsal abdomen to clearly capture the cross pattern. Use a macro lens or fill flash to highlight leg banding and spine details against background siding.
User Notes
Side of house
Identified: 2026-07-26T16:43:50.206792