The Yellow Sac Spider is very common in most of the United States and is the cause of a lot of spider bites and other unwanted encounters. They tend to hide in piles of clothes (clean or dirty) and bite if they feel pressure when the clothes are picked up or put on. Indoors, these small, white, paper-like sacs are often found along ceilings and corners, or behind pictures and shelves. It is smooth and its abdomen region is large and rather bulbous in appearance. Spot the yellow color of the spider. Spider Identification - Sac Spiders have slender bodies, large jaws and long, thin legs, with the males being especially slender. Females of the yellow sac spider cover her loosely distributed eggs with thin white silk. Yellow sac spiders vary in length, but average 6mm (about the size of a nickle). Their head and eyes may be covered with tiny black or silver hairs. This creature may be located in your home or business and given that it’s a venomous pest, it warrants your attention. The yellow sac spider over winters as spiderlings (juveniles) and molts to the adult stage during spring. hobo—the yellow sac spider Chira-canthium inclusum) (Fig. Learn more here about the yellow sac spider’s appearance, lifestyle and most importantly – its bite.. Find out some basics about the yellow sac spider below. 1). While the eyes are mostly black, the two middle ones might appear silver or gray. Sac spider bites are much more common than any other type of spider but are often misdiagnosed as a brown recluse spider bite. The jaws of the male spider are particularly enlarged. The egg sacs may be found in protected areas, or even wrapped in a folded leaf. Also, the sac spider has eight eyes instead of six. hobo—the yellow sac spider Chira-canthium inclusum) (Fig. This fact sheet discusses the biology of the yellow sac spider common to Utah, the effects of its venom, and more importantly, how to exclude them from your house. Most contact with Yellow Sac Spiders is accidental. The Yellow Sac Spider (Cheiracanthium inclusum) is also known as the Black-Footed Spider.The Yellow Sac Spider is one of a group of spiders in North America whose bites are generally considered to be medically significant. Yellow sac spiders vary in length, but average 6mm (about the size of a nickle). The reaction of a yellow sac spider may vary greatly from one individual to another. Size: About the size of a U.S. nickel, ... Notes: The yellow sac spider is commonly found in homes and it is often mistaken for the brown recluse because it is similar in shape, but the yellow sac spider lacks the "fiddle" pattern of the brown recluse. Like most other types of spiders, these pests don’t necessarily want to live near people. It is a very smooth spider and has three rows of eyes.

1). Size: The females are 0.20 inches to 0.35 inches (5mm to 9 mm), while the males have a length of 0.15 inches to 0.31 inches (4mm to 8 mm). This fact sheet discusses the biology of the yellow sac spider common to Utah, the effects of its venom, and more importantly, how to exclude them from your house. With the yellow sacspider you are looking at a spider that is about 1/2″ to 1″ in size. 5. How Did I Get Yellow Sac Spiders? The yellow sac spider's eight eyes are mostly equal in size and are arranged in two even lines. Most yellow sac spiders are pale yellow or tan. Adult size around 9 to 15 mm Most are shades of cream, brown or yellow, with a darker stripe along the upper abdomen. Color: It has a pale yellow-beige body, while its palps, jaws and tip of the feet have markings of brown or black (which have earned it the name black-footed spider).). The Yellow Sac Spider is slightly more aggressive than most house spiders and will bite, perhaps repeatedly, if threatened. Physical Description and Identification Adults. Yellow Sac spiders derive their name from the sac of silk they produce daily for resting.

Adults can be found from April through November, but in the hottest months, small spiders make up the largest proportion of the population. After mating, females lay 30-48 eggs, cover them in a thin, white silken sac and guard them. Physical Description and Identification Adults. Color: It has a pale yellow-beige body, while its palps, jaws and tip of the feet have markings of brown or black (which have earned it the name black-footed spider).). However, yellow sac spider bites can heal much more quickly than the bites of a brown recluse which takes about 2 to 3 months to heal. Size: The females are 0.20 inches to 0.35 inches (5mm to 9 mm), while the males have a length of 0.15 inches to 0.31 inches (4mm to 8 mm). Yellow sac spiders may wander inside through an open door or follow infestations of prey insects that may wander inside a home. Yellow Sac Spider. While many spiders exist, the yellow sac spider is one of the more common ones encountered.