Ground spider california3/16/2024 ![]() ![]() During this period, a feeble pulse, cold skin, labored breathing and speech, light stupor, and delirium may be noted. Respiration becomes spasmodic and the patient is restless and anxious. The venom then grows weak, tremors develop, and the abdominal muscles show a board-like rigidity. Local muscular cramps are felt 15 minutes to several hours after the bite, spreading and becoming more severe as time passes. ![]() The bite produces a sharp pain similar to a needle puncture. The severity of a person's reaction to the bite depends on the area of the body where the bite occurs the person's size and general sensitivity the amount of venom injected depth of bite seasonal changes (in venom potency) and temperature. Widow spider venom contains toxins that are neurotoxic (affects the nervous system). This spider does not usually enter residences. They are also found along foundation slabs, behind shrubs and especially where brick or wood siding extends close to ground level. These webs are frequently constructed underneath boards, stones, or the seats of outdoor privies. The widow's web is an irregular mass of fibers with a small central area to which the spider retreats while waiting until its prey becomes ensnared. Males are much smaller and lighter-colored, with light streaks on their abdomens. The abdomen is about 1/4 inch in diameter but may be as large as 1/2 inch when the female is full of eggs. These reddish or yellowish triangles form a characteristic hourglass marking. Females are easily identified because of their globular, shiny black or brown abdomen with two reddish or yellowish triangles on the underside. The black and brown widows are widely distributed over the warmer portions of the United States. Most species hide in cracks, darkened areas, or other retreats which they construct of silk. Others live in warm, dry places so are found in sub floor air-vents, in upper corners of rooms or in attics. Many spiders are associated with moisture and, therefore, are found in basements, crawl spaces, and other damp parts of buildings. ![]() However, they are undesirable to most homeowners when indoors, and the unsightly webbing spiders use to catch insect prey usually outweigh this beneficial behavior. Under most conditions outdoors, spiders are considered beneficial because they feed on insects. Even though there is generally little danger of complications from spider bites, you should advise all spider bite victims to take the spider specimen with them (if possible) when consulting their physician. Although all spiders use venom when they bite and kill their prey, the black widow and the brown recluse spiders are the only North American species consistently dangerous to humans. Remember that every "cobweb" was made by a spider. This creates an unsightly situation but causes no real harm. Certain common household spiders spin webs over lamps, in corners and in basements. Many species of spiders are common household pests in the United States. Spinnerets, located at the tip end of the abdomen, are silk spinning glands used for web making. Each fang has a small opening in the end through which venom is injected into the prey. At the end of each is a hollow, claw-like fang. All spiders have a pair of jaw-like structures, called chelicerae. Young spiders, or spiderlings, resemble the adults except for size and, sometimes, coloration. Their bodies have but two regions - a cephalothorax (fused head and thorax) and an abdomen. They possess eight legs which immediately separate them from insects, which have only six legs. The only distinguishable feature is that spiders have a characteristic appearance which is easily recognized by most people. Have Arachnophobia? Contrary to the 1990 Steven Spielberg movie made popular by John Goodman as the "Exterminator" and Jeff Daniels as the "Doctor" most spiders are harmless.
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