Common Trashline Orb-Weaver
Cyclosa conica
Araneidae (Orb-Weavers), Order Araneae. Key family characteristics include the construction of vertical orb webs and a generally high diversity of forms and colors.
Physical Description
The spider has a distinctive, elongated abdomen that extends far past the spinnerets into a prominent posterior tubercle or tail. The cephalothorax is compact, and the overall body texture is somewhat irregular due to tubercles and bumps.
Size Estimate
Body length is typically around 4 to 8 millimeters, with females being slightly larger than males. The specimen appears relatively small, blending exceptionally well with debris.
Coloration & Markings
Features mottled shades of brown, beige, silver, and white, creating a camouflage pattern that closely resembles a piece of bark, lichen, or detritus.
Web Type
Constructs a vertical orb web characterized by a distinctive 'trashline'—a vertical line of debris, leftover prey husks, and plant material running right through the center of the web.
Eye Arrangement
Typical araneid arrangement with eight eyes set in two rows, the lateral eyes often touching, and median eyes situated on a slight tubercle.
Leg Characteristics
Legs are moderately long, banded with brown and tan rings, and typically held tightly against the body or spread in a resting orb-weaver posture when on the web.
Venom & Safety Information
Venom Information
Contains mild venom used exclusively to subdue small insect prey. It poses no threat to humans.
Medical Significance
Harmless to humans. Bites are extremely rare because the spider is tiny, timid, and prefers to drop from its web or play dead when disturbed.
Safety Recommendations
No special precautions needed. Simply enjoy observing this harmless and fascinating architect from a safe distance.
Habitat & Behavior
Habitat & Range
Found across the Holarctic realm, including North America, Europe, and parts of Asia. Prefers wooded areas, forest edges, gardens, and shrublands where it builds webs among branches and foliage.
Behavior & Temperament
Sits motionless in the center of its web along the trashline during the day, relying on exceptional camouflage to avoid predators. Non-aggressive towards humans.
Diet & Prey
Feeds on small flying insects such as gnats, small flies, midges, and mosquitoes caught in its vertical orb web.
Seasonal Activity
Most active during the warm spring and summer months, with adults becoming fully apparent by mid-summer.
Description
The Common Trashline Orb-Weaver is a master of disguise in the insect world. By stringing debris, egg sacs, and insect husks across the center of its web, it creates a visual decoy that confuses predators and conceals its own outline. Hanging suspended within this debris line, the spider merges seamlessly with its surroundings.
Key Features
Elongated, tail-like abdominal extension and the characteristic vertical band of debris (trashline) built directly into the center of its orb web.
Similar Species
Other members of the genus Cyclosa, such as Cyclosa turbinata, which can be distinguished by subtle differences in the shape of the abdominal tubercle and geographic range.
Life Cycle
Overwinters as an egg within a papery egg sac attached to bark or twigs. Spiderlings hatch in spring, mature over the summer, and mate by late autumn.
Ecological Importance
Serves as an effective natural controller of small flying insect populations in woodland and garden ecosystems.
Conservation Status
Not evaluated by the IUCN, but populations are generally stable and widespread across its natural range.
Interesting Facts
The trashline not only hides the spider from hungry birds and wasps, but the accumulation of decaying matter may also attract certain small prey items looking for detritus.
Photography Tips
Use a macro lens to capture the unique abdominal shape. Focus on the center of the web to capture both the spider and its elaborate trashline against a natural background.
Identified: 2026-08-13T19:53:22.912024