They have black and white hairs which create stripes, giving this spider its name. The female zebra jumping spider can grow to 9mm with males growing to 6mm in body length. Zebra Jumping Spider Zebra jumping spider The abdomen starts with dark lines but has a series of chevron markings. The lines are not as thick as the wolf spider. They are often confused as a wolf spider, with two black lines running down the side of a tan midline. They are exceptionally fast and drag passing prey into the funnel of their webs. They have large spinnerets on the top of the abdomen, giving the appearance of having a short tail. These funnel-web weavers are known for the cave-like webs that they create on lawns, the spider hiding at the back. Grass spiders are common on summer nights in Illinois. Grass Spiders American grass spiderĬommon name: American grass spiders, grass spiders. They will bite if they are harassed, but their bites are harmless and are often compared to a bee sting. They can grow up to 1.10 inches (28mm) for females and 0.35 inches (9mm) in body length for males. They have distinct black and yellow markings on their abdomen with an almost white cephalothorax (the part of the body where the legs attach). Yellow garden spiders are also known and black and yellow garden spiders. Yellow Garden Spider Yellow garden spiderĬommon name: yellow garden spider, black and yellow garden spider, golden garden spider, writing spider, zigzag spider, zipper spider, black and yellow argiope, corn spider, Steeler spider, McKinley spider. They are common in fields, gardens, backyards, parks, and woodlands. Their markings can also vary with some having barely any pattern to others having a distinct zigzag pattern on the sides of their abdomens. They vary from orange/red to yellow/brown with some being tan. They hide in a curled leaf on the edge of their web during the day. Spotted orbweavers create orb-shaped webs that can be two feet in diameter. Spotted Orbweaver Spotted orbweaverĬommon name: Hentz orbweaver, spotted orbweaver, barn spider. Their webs are a safe place for them to retreat, store prey and eat their prey. They are black with spots and stripes on their legs and abdomen. The female can grow to 18mm in body length, with the male being smaller and growing to around 15mm in body length. The bold jumping spider is a harmless spider that you will probably encounter in your home in Illinois. Reduction of outdoor lighting or changing white light bulbs to yellow will help to attract fewer night-flying insects and thus reduce the spider populations.Common name: daring jumping spider, bold jumping spider. Reduction of other insects in and around a home will reduce the food available to the spiders, and removal of debris and lumber piles will help to reduce harborage sites. Sweeping is not likely to kill the spiders, but pyrethroid insecticides provide excellent knockdown and control. Sweeping of webs to remove them is an important step in cellar spider control, as these spiders do not reuse their own silk, and the webs continue to accumulate. There may be either 6 or 8 eyes, depending on the species, and the outer 3 eyes on either side of the head are arranged in a close triangle. The color is a yellowish brown and the legs may be as long as 2 inches. The female creates an egg mass of about a dozen eggs, and holds it in her jaws until the eggs hatch.Ĭellar spiders are easily identified by their extraordinarily long and thin legs, which are attached to their elongate and thin body. These spiders have been known to feed on black widow spiders. They hang upside down on their webs, and when disturbed they will begin to shake and bounce the web noticeably, or they may drop off the web and run to hide. Their long legs make them very clumsy when attempting to walk. Webs typically appear under the eaves of roofs, around porch lights, within garages, and indoors around windows where the light may draw small insects that the spiders feed on. Their primary crime is the messiness of their webs, which are thin and flimsy but tend to gather dust and floating debris, as well as the remains of the insects the spiders have fed on. The cellar spiders are incapable of biting humans and are harmless to us and our pets. However, the true Daddy Long-legs is another animal entirely, called the Harvestman. The cellar spiders are often called “Daddy Long-legs” due to their very long, thin legs. Several dozen species of Pholcids are native to North America, with the three species listed above the most common to be found in and on structures.
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