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Harmless or Deadly: How to Identify Common House Spiders

IDENTIFYING COMMON U.S. HOUSE SPIDERS KEY: NONE SPECIES IS LIGHTLY POPULATED COMMON HARMLESS SERIOUS DANGEROUS & DEADLY Non-toxic bite. Venomous, non-fatal bite. Toxic bite. Seek medical attention immediately. Potentially lethal. AMERICAN HOUSE SPIDER Parasteatoda tepidariorum DESCRIPTION: Yellowish brown with a dirty white, elongated abdomen with a few dark spots-sometimes a black triangular spot in the center. Males are smaller and darker. FOUND IN: Closets, upper corners, under furniture and angles of window frames. Also garages, sheds, barns, basements and crawlspaces. TRIVIA: They have very poor vision. When threatened and cornered, they will feign death. BLACK WIDOW The Latrodectus genus DESCRIPTION: Females are shiny black. Most have a red hourglass shape, or red spots on the underside of the abdomen.Look to the distinctive body shape to identify. Males are dark gray or brown, and if they have an hourglass shape it is yellow or white. FOUND IN: Woodpiles, stone walls, outdoor furniture or railings. Also garages, sheds, barns, basements and crawlspaces. TRIVIA: The females' venom is at least three times more potent than that of the males'. BROWN RECLUSE Loxosceles reclusa DESCRIPTION: Light to dark brown, often with violin-shaped marking on their back, with the neck of the violin pointing to the abdomen. Since the violin is not always present, the best way to identify the recluse is by observing the eyes-most spiders have eight eyes; recluse spiders have six eyes arranged in pairs. FOUND IN: Sheds, garages, basements and woodpiles. Also dressers, cardboard boxes and behind baseboards and pictures. TRIVIA: In 2001, more than 2,000 brown recluse spiders were removed from a heavily infested home in Kansas, yet the residents who had lived there for years were never harmed by the spiders. DADDY LONGLEGS The Opiliones order DESCRIPTION: Pale yellow to light brown or gray. Exceptionally long, thin legs. A fused body with no distinct head or abdomen. FOUND IN: Damp places such as basements, and crawlspaces. Also corners of garages, windows, ceilings, closets, as well as sink cabinets and bath traps and in other sheltered places. TRIVIA: The Opiliones have spider-like qualities, but are not true spiders. The head, thorax and abdomen are fused together; they have no venom or silk glands, and have two eyes. Spiders are from the Aranae order; most have eight eyes, a distinct waist, and produce silk. DOMESTIC HOUSE SPIDER Tegenaria domestica DESCRIPTION: Dark orange or brown, with a pale mark on the breastplate. Dark bands on legs. A V-shaped pattern runs lengthwise across the top of the abdomen. Distinctive funnel- shaped web. FOUND IN: Dark crevices behind furniture, cupboards. Also attics, basements, closets, storage rooms and other undisturbed places. TRIVIA: Often confused with the hobo spider, its relative, and a dangerous spider. If allowed to flourish in your home, the domestic house spider can out-compete the hobo spider, reducing their numbers and thereby limiting your risk of a hobo spider bite. HOBO SPIDER Tegenaria agrestis DESCRIPTION: Dark orange or brown, with a pale mark on the breastplate. Long have darker bands. A V-shaped pattern runs lengthwise across the top of the abdomen. A light stripe runs down the middle of the sternum. Distinctive funnel-shaped web. FOUND IN: Rarely disturbed places, such as behind furniture or cupboards. Also attics, basements, closets and storage rooms. TRIVIA: Hobo spiders are common in Europe, where they are native. It is believed that they first arrive in the United States in the port city of Seattle sometime before the 1930s. JUMPING SPIDER The Salticidae family DESCRIPTION: A variety of colors and sizes, they are recognized by their jumping behavior and rectangular-shaped faces with eight eyes in two distinct rows. FOUND IN: Cracks of hardwood floors, under furniture, in folds of drapery, between shelved books, the underside of doors and window molding. TRIVIA: Jumping spiders can use their silk for communication, safety lines, navigation, and to build "pup tents" where they sleep at night and shelter from bad weather. They molt, build and store egg cases, and overwinter within these little tent homes. SOUTHERN HOUSE SPIDER Kukulcania hibernalis DESCRIPTION: Males are uniformly brown, with slender bodies. They sometimes have a violin-like marking. Females have compact bodies that are dark brown or black. Both are covered in fine hair. FOUND IN: Dark recesses of windowsills, shutters, overhangs and other dark areas. The females stay close to their webs, but the males wander in search of prey and females. TRIVIA: This spider is frequently kept as a pet by arachnid enthusiasts. YELLOW SAC SPIDER Cheiracanthium genus DESCRIPTION: Usually pale, ranging from yellow to beige. The first pair of legs are longer than the others. Legs have dark tips. FOUND IN: Corners where the ceiling and wall meet, behind picture frames, along the wall and ceiling, along baseboards. Also, wood piles and other undisturbed areas. TRIVIA: These spiders led to a recall of around 65,000 '09-'10 Mazda6 vehicles in the US, Canada, Mexico and Puerto Rico after they were found building nests in the fuel system of the vehicles. BROUGHT TO YOU BY PESTCONTROLEXPERTS.COM Pest Control EXPERTS This infographic is intended for general education purposes only and should not be relied on as a substitute for professional and/or medical advice. housingandclothing/dk1033.html -spiders spiders.html

Harmless or Deadly: How to Identify Common House Spiders

shared by BuggyJ on Nov 07
Could you tell the difference between a deadly brown recluse and a common basement spider? Check out this chart and see if danger is lurking on eight legs in your home!


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