The females often carry their eggs in a sac attached to their jaw or chelicerae until they’re ready to hatch. When threatened, these spiders often bounce on their webs or drop to the ground and play dead. These spiders are not aggressive and are not known to bite humans. Cellar spiders range in color from light brown to gray, and they spin large, messy webs which they use to catch insects. They are long-legged with small bodies and often confused with daddy-long-legs. Cellar spiders Long-bodied Cellar Spider | image by Judy Gallagher via Flickr | CC BY 2.0Ĭellar spiders get their common name from their habit of living in dark, secluded areas like cellars, garages, and crawl spaces. If you do get bitten, it’s not usually serious and will only cause minor swelling, redness, and pain that subsides after a few minutes. While they don’t typically bite humans, yellow sac spiders can be aggressive if they feel threatened. These spiders are generalist predators and will eat just about any small arthropod they can catch, including insects, mites, and other spiders. During the day, yellow sac spiders often hide in these sacs, coming out at night to hunt for food. They get their name from the silken sacs, where they spend much of their time, both as larvae and adults. It has a dark stripe running down the middle of its abdomen and is sometimes mistaken for a young brown recluse spider. The Yellow sac spiders are tiny and light-colored arachnids, typically between ¼ and ½ an inch in length. Yellow Sac Spiders Yellow sac spider on a leaf 10 Common Spiders in Coloradoįrom ground spiders and jumping spiders to house spiders and yellow sac spiders, below are among the most common spiders in Colorado, as well as their habits and how to deal with them if they become a nuisance: 1. Here’s a closer look at some of the most common spiders you’re likely to encounter in the Centennial State. If you live in Colorado, there’s a good chance you’ve come across one or more of these common spider species. Spiders are often feared and maligned, but many of them are actually harmless (and even beneficial) members of the animal kingdom.
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