Spiders create structures that many people refer to as “nests.” While these are not built like a bird’s nest from twigs and leaves, spiders construct various silken structures for specific purposes. These silk constructions provide shelter, offer protection, or serve as safe places for reproduction and development. Understanding these diverse structures clarifies how spiders utilize their environment.
Understanding What a Spider Nest Is
A “spider nest” refers to a silken structure built by a spider for shelter, protection, or, most commonly, for reproduction, rather than a web solely for hunting. Spiders produce various types of silk from specialized glands, each with unique properties. Some silk types are strong and elastic for structural support, while others are soft and sticky for wrapping prey or constructing egg sacs. The appearance of these structures varies, often appearing as small, sometimes inconspicuous, silken retreats or as distinct, compact sacs. The term “nest” in common usage often points specifically to these egg sacs.
These structures are fundamentally different from the familiar orb webs or funnel webs spun primarily to capture insects. While a hunting web might offer some incidental shelter, a true spider “nest” is intentionally constructed as a more permanent dwelling or a nursery. The silk used for these specialized structures is tailored for durability and insulation, providing a microhabitat for the spider or its offspring.
Why and Where Spiders Construct Nests
Spiders construct these silken structures for several essential life functions. Many spiders build retreats for shelter, offering protection from predators or harsh weather conditions. During molting, when a spider sheds its rigid exoskeleton to grow, it is particularly vulnerable; therefore, a secluded silken retreat provides a secure environment for this delicate process. Some species also create insulated shelters for overwintering to survive colder temperatures.
A significant reason for “nest” building is the creation of egg sacs, which are silken enclosures designed to protect developing eggs. These sacs can house dozens to thousands of eggs. Spiders strategically place these structures in hidden, undisturbed areas. Common indoor locations include corners, basements, attics, garages, behind furniture, or within wall crevices. Outdoors, these silken retreats and egg sacs are often found under leaves, within dense vegetation, under rocks, or in woodpiles.
How to Identify and Manage Spider Nests
Identifying a spider “nest” often means recognizing an egg sac, which appears as a small, compact silken ball or disc. These sacs vary in color, seen in shades of white, cream, tan, or brown. Their texture can range from smooth to spiky or papery, and their size is generally smaller than a quarter. Finding numerous tiny spiderlings or shed exoskeletons nearby can also indicate the presence of a recently hatched or occupied nest.
When managing these structures, safe removal is a practical approach. Vacuuming is an effective method for eliminating webs and egg sacs; dispose of the vacuum bag or contents outdoors to prevent hatching. For accessible areas, a broom or duster can also be used. To deter future activity, sealing cracks around windows and doors, and maintaining a clean, clutter-free environment, can reduce potential nesting sites. If dealing with a large infestation or concerns about venomous species, contacting a professional pest control service is a prudent course of action.