orb web

An orb web is a circular, wheel-shaped web constructed by spiders known as orb weavers. While all spiders produce silk, only about half of all species build webs to catch prey. Orb webs are considered an efficient design, covering a large area with minimal silk, and they act like an air filter for insects.12345

The construction of an orb web involves several steps:
* A silk thread is released and carried by wind until it attaches to an object, forming a bridge.
* The spider reinforces this bridge and then descends to secure a thread on the ground or another surface.
* Radial lines, or spokes, are created from the center to the outer edges.
* Temporary spirals are laid down, followed by a final spiral of sticky silk to trap prey.46

These webs are often rebuilt daily or nightly and are repaired if damaged. Orb weavers are a large and widespread group of spiders, with over 2,840 known species.42