Barn Spider, Spotted Orbweaver, Cross Orbweaver
Neoscona crucifera (most likely) or Araneus diadematus
Araneidae (Orb-Weavers), Order Araneae. Characterized by building vertical, wheel-like orb webs and having eight similar-sized eyes.
Physical Description
Bulky, bulbous abdomen typical of mature female orb-weavers, with a smaller cephalothorax. The body appears robust and slightly hairy, positioned centrally in or near its web under the eaves.
Size Estimate
Body length estimated around 10 to 20 mm for a mature female, with a leg span of approximately 30 to 40 mm. This appears to be an adult specimen.
Coloration & Markings
Warm brownish, reddish-tan, and orange-brown tones on the dorsal side, featuring distinct patterns or spots on the abdomen, common for nocturnal orb-weavers found around human structures.
Web Type
Vertical orb web constructed during the evening or night, often built near outdoor lighting or building structures to catch flying insects.
Eye Arrangement
Eight eyes arranged in two rows, typical of the Araneidae family, with lateral eyes often grouped in pairs.
Leg Characteristics
Medium-length, moderately thick legs with subtle dark and light banding and visible spines, held in a typical sprawling orb-weaver posture.
Venom & Safety Information
Venom Information
Neurotoxic/cytotoxic venom used strictly to subdue insect prey. It is low in potency and not medically significant to humans.
Medical Significance
Harmless to humans. A bite is extremely rare, usually only occurring if pressed directly against the skin, resulting in mild localized pain and swelling akin to a mosquito bite.
Safety Recommendations
Leave undisturbed. If relocation is necessary, gently guide the spider into a container using a piece of cardstock and release it into a nearby garden.
Habitat & Behavior
Habitat & Range
Found across North America and Europe, commonly inhabiting outdoor structures, porches, eaves, barns, and gardens.
Behavior & Temperament
Nocturnal or crepuscular builder of orb webs. Often retreats to a hide or the edge of the web during the day, becoming active at night. Very docile and reluctant to bite.
Diet & Prey
Flying insects such as moths, beetles, mosquitoes, and flies captured in the vertical orb web.
Seasonal Activity
Most visible and active during late summer and autumn when females reach maximum size before producing egg sacs.
Description
A classic nocturnal orb-weaver often found resting under porch roofs and building eaves. With its robust brownish body and penchant for spinning magnificent wheel-shaped webs near porch lights, it acts as a welcome and harmless nighttime predator.
Key Features
Bulbous rounded abdomen, warm brown to orange coloration, association with vertical orb webs near human structures, and nocturnal habits.
Similar Species
Other Araneus and Neoscona species, distinguished primarily by subtle abdominal markings, venter patterns, and genital structures.
Life Cycle
Annual life cycle. Mating occurs in late summer or autumn, after which females lay eggs in a silken egg sac attached to protected surfaces, dying off before winter. Spiderlings emerge in spring.
Ecological Importance
Serves as an effective natural pest control agent by consuming large numbers of flying insect pests around homes and gardens.
Conservation Status
Not evaluated by the IUCN, but populations are secure, abundant, and widespread.
Interesting Facts
Many orb-weavers consume their own webs daily to recycle proteins before spinning a fresh one just before dusk.
Photography Tips
Use a macro lens with a flash or a bright off-camera light source at night when the spider is active in its web to capture clear dorsal patterns.
Identified: 2026-08-26T11:55:12.817898