Early one humid summer morning we discovered lawn lace in the yard. Dozens of laces were scattered on the grass and mulch we’d put around trees. Dew drops on their tiny filaments sparkled in the early morning sunshine. What had we found? Who made them?

As kids we called them fairy rings and marveled at their delicate nature.

Shelf Spiders

The hole reveals the entrance to the web.

They were crafted by industrious hungry spiders overnight. We call them shelf spider webs because they are positioned horizontally. Others call them funnel or tunnel spiders. Look closely to find a hole, usually toward the side, where the spider lurks.

The web isn’t sticky but has so many tiny filaments that a wandering insect often gets its feet tangled there, slowing it down. In a flash the fast-moving spider is out claiming its breakfast.

What Are They?

There are many species of shelf spiders found throughout the world in the genus Aselemidae. Some 111 species live north of Mexico. They pose no threat to people, but may pose a major threat to bugs, who often see the conspicuous webs but not their builders. The web’s architect and builder stay hidden. By late morning sunshine has usually evaporated the dew, making the webs hard to spot. They’re best enjoyed when the world is cool and fresh at dawn.

We usually think of shelf spiders as a September yard feature but in 2025 we began seeing them in July. We like them. Their dainty webs are as intriguing as they are beautiful. Perhaps more important, the presence of these spiders indicates that the lawn is healthy. It’s not been poisoned with insecticides. This allows harmless insects to thrive in the turf to feed the spiders.

Surrounded by Spiders

Many people consider spiders threatening, ugly, and undesirable animals. Come Halloween some even stretch fake webs in their porch to scare trick or treaters. A few spider species can inflict a painful and dangerous bite, but most species are tiny and hardly ever seen by people. They cause no problems and live in lawns, gardens, prairies and trees. They are beneficial.

Want to learn more? An interesting resource is spidermentor.com. 

We enjoy watching brown creepers, nuthatches and warblers climbing tree trunks or flitting around branches. They’re often foraging for tiny protein-rich spiders. Even in the depths of winter dormant spiders provide food for hungry songbirds.

Be happy if some morning you spot lawn lace. Shelf spiders have been at work setting their intricate traps to catch a breakfast of tasty insects.