Overview
- The interconnected web spans about 106 square meters (roughly 1,076–1,140 square feet) inside Sulfur Cave.
- Researchers estimate the colony includes about 111,000 spiders, chiefly Tegenaria domestica and Prinerigone vagans.
- The study identifies the first documented colonial web formation for these species, which typically live alone.
- Molecular analyses confirm species identities and show the cave populations are genetically distinct from surface relatives.
- Czech cavers first noted the web in 2022, scientists conducted fieldwork in 2024, and findings were published on October 17, 2025 in Subterranean Biology.