Grass Spider "Tents" on Wet Lawn: Not Umbrellas

Question: After 2 rainy days in Gloucester, MA, dozens of flat spider web "tents" on lawn. Built by grass/funnel spiders? Are they rain shelters?

Answer: Webs Are for Hunting, Not Rain

• Built to catch small flying insects
• Present most of time; dew/rain makes them visible
• Non-sticky sheet web + barrier threads above
• Insects hit threads → fall on sheet → captured by fast-running spider
• Also serve as spider retreat/hiding spot

Amazing But Not Umbrellas

Smart? Yes. Rain shelters? No. They're always there—you just noticed them because moisture highlighted the silk.