Cross Orbweaver

The cross orbweaver, Araneus diadematus, also known as the European garden spider, is one of the most familiar orb-weaving spiders across its range, instantly recognizable by the pattern of white spots forming a rough cross shape on its rounded abdomen. Native to Europe, it has become established in parts of North America as well, where it is a common sight in gardens, hedgerows, and around porches in late summer and autumn.

This species is a textbook example of orb-web construction, spinning a nearly perfect wheel-shaped web of radiating spokes connected by a sticky spiral. Because the sticky silk loses its effectiveness over time, cross orbweavers typically consume and rebuild much of their web each day, often working at dusk, which makes them one of the more commonly observed spiders actively building a web.

Cross orbweavers are important predators of flying insects in the habitats they occupy, and their large size and conspicuous webs make them one of the more noticeable spider species encountered by gardeners in late summer.

• Rounded, bulbous abdomen with a pattern of light-colored spots forming a rough cross or diadem shape
• Base color ranges from pale tan to reddish-brown or nearly black depending on the individual
• Females are considerably larger and rounder than the smaller, more slender males
• Legs are banded with alternating light and dark segments
• Builds a large, classic wheel-shaped orb web with spiral sticky threads, often rebuilt nightly
• Lookalikes include other Araneus species, which can be distinguished mainly by the specific pattern and shape of the abdominal markings

Cross orbweavers are found in gardens, woodland edges, hedgerows, and around building eaves and porch lights, where flying insects are drawn to light. They are especially conspicuous in late summer and early autumn when they reach full size just before breeding. Native to Europe and parts of Asia, the species has also become established in the northeastern United States and parts of Canada.

This spider builds a large, vertical orb web, typically between shrubs, fence posts, or under eaves, and waits at the hub or in a nearby retreat connected by a signal thread. When an insect strikes the sticky spiral, vibrations alert the spider, which rushes out to subdue and wrap the prey in silk. Cross orbweavers commonly take down and rebuild much of their web each evening to keep the silk fresh and sticky. They are not aggressive and will typically retreat or drop from the web on a silk line if disturbed. As predators of moths, flies, and other flying insects, they help regulate insect populations around gardens and woodland edges.

After mating in autumn, females produce a silk-wrapped egg sac containing hundreds of eggs, hidden in bark crevices or under structures, and typically die shortly afterward as cold weather sets in. The eggs overwinter and spiderlings hatch the following spring, dispersing on silk threads carried by the wind. They molt repeatedly through spring and summer, growing to full adult size by late summer, when mating begins and the annual cycle repeats.