“Funnel weavers in the genera Tegenaria and Eratigena are adapted to reproducing in buildings and are among the most common household spiders in the state. The funnel weaver spiders are harmless to humans.” Dr. Whitney Cranshaw, Colorado State University
Spiders are arachnids, closely related to other 8-legged critters like ticks, mites, harvestmen, and scorpions. Spiders help to kill other pests both in, and out of buildings, and are beneficial. The most common spiders found in and around homes in Colorado are widow spiders, funnel weaver spiders, cobweb spiders, cellar spider, sac spiders and wolf spiders.
There are only a few spiders whose bite requires medical attention, such as the western or black widow spider. Brown recluse spiders are not native to Colorado.
- Caulk, seal and screen all entry points into the building to exclude spiders.
- Change exterior lighting from the standard lights to sodium vapor bulbs to limit prey insects coming to the building.
- Vacuum regularly to suck up spiders, webbing, and other insects that can serve as food for spiders.
- Minimize clutter in classrooms to reduce areas suitable for spiders to hide, reproduce, and lay eggs.
- Use sticky traps along baseboards to monitor and help control ground dwelling spiders.