Geometry.Net - Basic_B: Black Widow Spiders

BBC NEWS | UK | Tesco Denies Using Deadly Spiders
A supermarket says it is not using black widow spiders to protectfruit, after three people find the spiders on grapes.
http://news.bbc.co.uk/1/hi/uk/2517711.stm

Extractions: Tesco has admitted that a drive to use less pesticides in its food could mean more spiders turning up in bags of fruit. But the supermarket denied that food producers are using black widow spiders, after three customers found them in bags of grapes. In separate incidents, the three women discovered the deadly spider among American-grown grapes bought from Tesco stores. Two of the spiders were alive. The company says producers do use natural predators to protect fruit, as an alternative to chemicals. The black widow spider has a distinctive red marking But it strongly denies that the distinctive spider, whose venom is 15 times more potent than a rattlesnake, is deliberately used on suppliers' crops in the US. Spokesman Jonathan Church said the use of natural predators, including harmless spiders, and less pesticides could have allowed the more lethal spiders into the fruit.
Ananova - Tesco Denies Using Black Widow Spiders To Protect Fruit
claims that using natural predators instead of pesticides to protect its fruit isincreasing the chances of customers being confronted by black widow spiders.
http://www.ananova.com/news/story/sm_716816.html?menu=
Log Cabin Chronicles Charlie Bury's Black Widow Spider Column
Brian's Excellent Adventure With black widow spiders. CHARLES BURY. Digital Image© 1999 Perry Beaton. black widow spiders don't normally live in Quebec.
http://www.tomifobia.com/spider.html

Extractions: Brian's Excellent Adventure With Black Widow Spiders CHARLES BURY STANSTEAD, QUEBEC Brian McIntyre's latest car was "loaded." It came with everything including half a dozen deadly Black Widow spiders Like all his family, Brian has been a lover of classic cars for as long as he can remember, and a trader for probably 30 years. But the Ford Fairlane he bought this spring was the first vehicle ever to bring him a near-death experience well, almost Since their newest old car arrived this summer the McIntyres have been feeling a little edgy. Their backyard garage has been invaded by a family of spiders not just any kind, but the potentially deadly Black Widow Black Widow spiders don't normally live in Quebec. These apparently hitchhiked here from California, by way of Ontario McIntyre bought his four-door 1955 Fairlane from auto trader Lyall Trenholme, of Shakespeare, a village a few miles outside Stratford, Ontario. Trenholme had bought the car last winter from another trader in California Neither buyer paid extra for the spider surprise. McIntyre says finding them was an unpleasant surprise
KOBTV.com - Eyewitness News 4 - New Mexico News, Weather, Sports
black widow spiders being found in bags of grapes. A warning for grapelovers Deadly spiders are actually turning up in bags of the fruit.
http://www.kobtv.com/archive/2002/december/18/spiders-grapes.htm
Black Widow Spider- ENT/rsc-1
Young black widow spiders are tanto-gray in color and have orange and white racingstripes on their abdomens. These marks may remain visible on adults.
http://www.ces.ncsu.edu/depts/ent/notes/Urban/blackwid.htm

Extractions: Insect Note - ENT/rsc-1 RETURN The black widow spider, Lactrodectus mactans , is probably the most widely recognized of the dangerously poisonous spiders found in North Carolina. Most people are familiar with the large, shiny black body and red "hourglass" markings on the underside of the abdomen (see picture), but it is important to note that the coloration and markings are only found on adult females. Young black widow spiders are tan-to-gray in color and have orange and white "racing stripes" on their abdomens. These marks may remain visible on adults. The female has a body length of about ", with a total length (including legs) of about 1 ". The male spider is smaller than the female and, like young spiders, has red and white markings on the back of its abdomen. Black widow spiders are found in protected places, such as under rocks, wooden boards and in dense plant growth. They frequently nest in electrical, water and telephone equipment boxes outdoors. Around homes, these spiders may be found in crawlspaces, beneath appliances, usually in corners that are dark and damp. The female produces an egg sac containing 250-750 eggs that hatch in two to four weeks, depending upon temperature. The spiders spin a web that is used to ensnare prey, mostly insects, but sometimes other spiders as well. The trapped victim is bitten, then injected with venom to paralyze it.
Black Widow Spider
Southern and northern black widow spiders. Order Araneae Family TheridiidaeGenus and species Latrodectus mactans (F) and L. variolus Walckenaer.
http://www.uark.edu/depts/entomolo/museum/widow.html

Extractions: Latrodectus mactans , is probably the most common species in this state. The posterior portion of the red hourglass on the underside of the abdomen may appear more like a rounded rectangle than a triangle, and there is usually a row of red spots on top of the abdomen. The northern black widow, L. variolus , is more common in the northern states. The anterior and posterior portions of the ventral hourglass are not joined at the middle. Black widows spin webs of coarse silk, usually near the ground in dark places, and usually outdoors. They do not leave their webs voluntarily and are clumsy and completely out of their element away from them. Piles of rubble, sheds, garages, crawl spaces, cellars, and basements may harbor these spiders. Although the nocturnal black widows are not aggressive, females will bite when provoked sufficiently. Males, which are rarely seen, do not bite, and they are much smaller, narrower, and generally more brightly colored than females. The insertion of the female's fangs produces a pinprick sensation, followed by a burning sensation for a few minutes. Pain usually progresses up or down the arm or leg, finally localizing more or less in the abdomen and back. The abdominal muscles become rigid and board-like with severe cramps. Other symptoms may be nausea, depression, insomnia, tremors, a speech defect and a slight rise in body temperature. The general symptoms may appear after a few hours or may be observed within a few minutes of the bite. Muscular spasms and cramps of the arms, legs, back and abdomen may be quite painful at the height of the reaction. Fatalities are rare, and the robust usually recover quickly and completely.
Black Widow, MU Extension, University Of Missouri-Columbia
Male black widow spiders are smaller than females and have yellow and red bandsand spots on their backs. Only mature females of the species are poisonous.
http://muextension.missouri.edu/explore/wildthing/blackwidow.htm

Extractions: The black widow, Latrodectus mactans, is one of two poisonous spiders found in Missouri. The black widow has a jet-black body, a red hourglass mark on its abdomen and long legs. Male black widow spiders are smaller than females and have yellow and red bands and spots on their backs. Only mature females of the species are poisonous. The females usually eat the males after mating. Use caution while cleaning garages, sheds or piles of lumber or debris this spring. Black widow spiders are not aggressive, but they spin tangled webs of coarse silk near the ground in littered areas. If they are disturbed or pinned, they will bite. Their bite is more toxic than a rattlesnake bite, though so little venom is injected into the victim few people die as a result. The first step in spider control is sanitation. Keep undisturbed areas of a structure free of clutter. Periodically move stored materials and vacuum the area. Chemical control is more effective when coupled with good sanitation. Household sprays may be applied in the basement, attic, storage area, behind furniture and in other nooks and crannies. Outside areas to treat include around doors and windows, under the roof eaves, under porches, and crawl spaces if they are accessible. Because of constant reinfestation from out-of-doors, chemical control will not guarantee freedom from spiders.
Black Widow (Latrodectus Variolus)
black widow spiders are black, shiny and have a very round abdomen. Be verycareful when working around areas where black widow spiders may live.
http://www.michigan.gov/dnr/0,1607,7-153-10370_12145_12204-36489--,00.html

Extractions: Black Widow ( Latrodectus variolus The version found in Michigan is called the northern black widow spider. These spiders are not nearly as large as many people think. The body of the female spider is about ½-inch long (1½-inch long including the legs). Males are smaller. Black widow spiders are black, shiny and have a very round abdomen. Females have a red spot (often shaped like an hourglass) on the underside of its abdomen. The male lacks the red hourglass marking but may have yellow and red bands and spots over the back. Black widow spiders are common around woodpiles and are frequently encountered when homeowners carry firewood into the house. They may also be found under eaves, in boxes, outdoor toilets, meter boxes and other undisturbed places. While they may bite when touched or harmed, they are not aggressive. Be very careful when working around areas where black widow spiders may live. Wear gloves and pay attention to where you are working. Black widow bites are sharp and painful, and the victim should go to the doctor immediately for treatment. To control the black widow, carefully remove all materials where they might hide. They can be cleaned out of an area simply by knocking down the webs, spiders, and round tan egg sacs with a stick and crushing them underfoot.
Black Widow Bites - Valley View Hospital
Insecticides Since black widow spiders spend most of the time in or on webbing, thoroughapplications of fine particles of insecticides, such as ULV, aerosols
http://www.vvh.org/health/topics/blkwidow.htm

Extractions: As the weather outside turns colder, critters will begin seeking warmer shelter in local houses, barns, basements, sheds and woodpiles. A most unwelcome guest that appears during this yearly indoor migration is the black widow spider. The poisonous black widow is common throughout Colorado. Reports indicate that bites result in death for only one percent or less of the cases, usually occurring in very young or very old individuals. With healthy people, recovery is usually complete in 2 to 5 days. However, this spider is considered the most venomous spider in North America. It is not aggressive, and fatalities from its bite are uncommon. However bites can cause serious illness, so precautions are especially in order at this time of year. The female black widow is poisonous and the male is not. The female is about 1.5 inches long, jet black in color and usually has a red hourglass marking on the underside of the abdomen. The male is smaller with brown markings. This spider is found in undergrowth, under stones, in garages, window wells, crawl spaces and basements. Homes in new developments will be bothered for some time from natural populations in the area. Black widows spin tangled webs of coarse silk in dark places, usually outdoors. Webs are usually built near the ground (occasionally within dwellings). The female lays eggs in silken cocoons or sacs that are globular in shape and about 1/2 inch in diameter. Sacs are white at first, later turning pale brown. About 300 to 400 eggs per sac are common with 4 to 9 egg sacs produced during a summer. Normally, only 1 to 12 young survive after the egg incubation period of 14 to 30 days due to cannibalism.
Black Widow Spider
black widow spiders. Order/Family Areneae/Theridiidae. Biology Black widowspiders lay their eggs in silken sacs which they protect in their nests.
http://www.accupest.com/html/black_widow_spider.html

Extractions: Recommended Products are linked under control below Black Widow Spiders Order/Family: Areneae/Theridiidae Scientific Name: Latrodectus spp. Description: The body of the female black widow spider is about 1/2-inch long, glossy black with a nearly globe-like abdomen. The abdomen has two triangular red spots on its underside arranged in such a way that the spots look like an hourglass. Males are much smaller than the females, 1/4-inch long with a longer, narrower abdomen and somewhat longer legs. Spiderlings are mostly orange and white but become increasingly more black as they mature. Biology: Black widow spiders lay their eggs in silken sacs which they protect in their nests. A female produces from six to 21 sacs during her lifetime, each containing 185 to 464 eggs. The young spiderlings remain in the case until the second molt. They live in the vicinity of the nest for two to three weeks before producing long threads of silk that help them float away, much as kites float. Female spiderlings undergo from four to nine molts before maturing; this process requires from 54 to 107 days. Development time (i.e., from egg to adult) is approximately one year. Females live up to three years and males approximately 180 days. Habits: Black widows are shy, preferring to build their webs in dry, protected locations where their prey is likely to travel. Outdoors they can be found among rocks and wood piles, under decks, in hollow stumps, rodent burrows, beneath benches, etc. They prefer basements, crawl spaces, and garages in structures as well as other protected areas such as barns, sheds, meter boxes, brick veneer, pump houses, etc. The webs, which are irregular in shape and approximately one foot in diameter, are used to trap their insect prey which is then paralyzed by their venom. Females often eat the males after mating, thus, giving them their rather morbid name. Females produce a neurotoxin and bite if disturbed or handled roughly. Each year several deaths are attributed to the bite of black widow spiders as a result of anaphylactic reactions, however, in most cases, the bite is no worse than a wasp sting.
Black Widow | Poisonous Spiders | Venom
There are about six species of black widow spiders and all of themare poisonous. Kidzworld has homework help, science fair project
http://www.kidzworld.com/site/p159.htm

Extractions: There are about six species of black widow spiders and all of them are poisonous. The female is more deadly than the male. She has a shiny, black body with a reddish hourglass shape on the underside of her belly. Her body is usually about two and a half centimeters long, including her legs. The male is around half her size and sometimes has a pair of reddish stripes on the side of his body. Where to Find Them Nobody in the US has died from a black widow bite in 10 years, but it can still be painful if the female does attack. The more timid male does not bite humans - it's the female that's more aggressive. The only time someone might die from a bite is if no medical attention is available. The bite itself looks almost like a bullseye, with a lighter area surrounded by a red circle.
Brown Recluse, Black Widow Spiders Unwelcome Visitors
Brown Recluse, black widow spiders Unwelcome Visitors. Spiders mayhave a place in the great scheme of things helping keep the
http://www.tamu.edu/univrel/aggiedaily/news/stories/01/080301-1.html

Extractions: Spiders may have a place in the great scheme of things - helping keep the insect population down and so forth - but people don't want that place to be in their own homes. Spiders' reputation as scary beasts is far bigger than their real role in ecology. In the Texas Cooperative Extension publication, "Spiders," (L?1787), J. A. Jackman, Extension entomologist, wrote: "Their beneficial role in keeping insect populations in check far outweighs the hazard posed by the few spiders that occasionally bite humans. Very few of the nearly 900 species of spiders in Texas can hurt people." However, it's those "very few" spiders that can harm humans that cause all the confusion and panic. Although Jackman reassured consumers that tarantulas, jumping spiders and wolf spiders, among others, aren't particularly dangerous to people, he warns that recluse spiders and black widow spiders are.
Black Widow
the abdomen. Young black widow spiders are tangray in color, andhave orange and white stripes on their abdomens. Black widows
http://www.aacpl.net/rp/parks/QuietWaters/black_widow.htm

Extractions: The Black Widow Spider The female black widow spider is one of the most recognizable spiders in Maryland. Its characteristic red hourglass on its glossy black abdomen makes identification easy. The female reaches a body length of approximately 13mm (.5in) long, and a total length of 1-1.5in. Males are considerably smaller, are rarely seen, and have four pairs of red marks along the sides of the abdomen. Young black widow spiders are tan-gray in color, and have orange and white stripes on their abdomens. Black widows can be found in protected areas, such as under rock, wood and dense plant growth. Around the home, black widow spiders can be found in crawlspaces, beneath appliances, equipment boxes, and in corners that are dark and damp. The female lays approximately 250 eggs in an egg sac, which is about .5-5/8 in diameter. The eggs hatch in 20 days and remain in the sac from 4 days to 1 month. The spiderlings then molt and begin to feed.
Pest Information
The black widow spider is one of the two dangerously poisonous spiders foundin the United States. black widow spiders spin webs made of coarse silk.
http://www.bugsmart.com/Index.mv?parm_func=PI_BlackWidow
Central San EducationLess-Toxic Home Garden - Spiders, The
In the Bay Area, the only spider to cause concern is the black widow (seeblack widow spiders). Cases of Mistaken Identity. black widow spiders.
http://www.centralsan.org/education/ipm/spiders.html

Extractions: Spiders are beneficial creatures. Because they feed on large quantities of insects, they should be tolerated as much as possible in the home and garden. Spiders are not insects. They are classified as "arachnids" and have eight legs. Insects have six legs. Mistaken Identity What Can I Do? Black Widow Printable Spiders ... People often think they have been bitten by a spider when the culprit is actually a flea, tick, mite, or even a disease condition. Very few spiders are equipped with mouth parts that can pierce human skin. If the bites you are discovering are small, mild, and disappear within a day or two, there is probably nothing to be concerned about. Of course, if a bite affects a large area, is very painful, and/or is followed by dizziness, fever, nausea, or any other severe symptoms, seek medical advice immediately. Try to capture the offending spider, drop it into a small jar of rubbing alcohol, and save it for identification.
Black Widow - The Spider
sometimes death. Despite it's reputation, however, black widow spidersare passive and bite humans only defensively. The male is
http://www.blackwidow.org.uk/bwthespider.html

Extractions: The female is easily recognized. She is about 1.2 cm (about 0.5 in) long, with a leg span of up to 5cms (2 ins) and is jet black, with an hourglass-shaped red patch below her almost spherical abdomen. In spite of her size, she has a powerful venomous bite and may cause a wide range of symptoms in humans, including pain, swelling, nausea, faintness, difficulty in breathing and sometimes death. Despite it's reputation, however, Black Widow spiders are passive and bite humans only defensively.
1988 Alliance Black Widow Spiders
1988 Alliance of Miami. The Spider Show Tale of the Black Widow .Music Original Music by Rudy Sanchez Sound Design Studios.
http://www.allianceofmiami.com/history/years_of_history/1988.html

Extractions: "The Spider Show" - "Tale of the Black Widow" Captains: Director: Tony Florio Uniform design and construction: Mary Searcy Staff: Mark Tatum, Andrea Gaeta, Michael Long, Maurice Long, Robert Sheldon, Patty Stetson The Alliance of Miami is a non-profit youth organization If you find any errors or unreadable pages, please send the address to the webmaster Contact us Join Fundraising ... Alliance Store - 2003 Alliance Media
CU Museum: We've Moved!
Spiders! black widow spiders Latrodectus (Family Theriidae) Are black widows foundin Colorado? Yes, and they appear to thrive in areas of human habitation.
http://www.colorado.edu/CUMUSEUM/research/entomology/faq/faq.html
Black Widow Spider (Latrodectus Hesoerus)
This is the most likely habitat for hungry black widow spiders. Their biteis painful and is the most toxic of all spiders in the Central Valley.
http://kaweahoaks.com/html/latrodectus_hesoerus.html

Extractions: In nature, and especially at Kaweah Oaks Preserve, never put your hand into a squirrel, rabbit or other dark hole in the ground or tree. This is the most likely habitat for hungry Black Widow Spiders. Their bite is painful and is the most toxic of all spiders in the Central Valley. Its poison can cause flu-like symptoms and, in severe cases, liver damage - especially in young children or the elderly. Immature Black Widows have the same shape as the mature "Widow" but with dramatic color markings. An immature Widow, although much smaller that an adult, can still cause a painful and dangerous bite. As you can see, the characteristic hourglass marking is yellowish, not red, in this young female spider. After mating, the female spider takes on the sinister black with red hourglass coloration. The Male Black Widow Spider
Child Health And Safety Center Black Widow Spider
black widow spiders build their tangled webs, which look similar to spun cottoncandy, under or between rocks, under loose bark, around outdoor water faucets
http://www.umm.edu/childsafety/outdoor_safety/ency/black widow spider/blackwidow

Extractions: Home Medical Reference Child Safety Outdoor Safety Black Widow Spider Poisoning from the bite of a black widow spider. What is it? (Overview) One of the most feared spiders on earth, the adult female black widow has a bite that kills, though rarely. fig.1 She has a globe-shaped, shiny black body with a red or orange hourglass-shaped mark on her abdomen and is about 2 centimeters long. Younger females are sometimes brown. Male spiders are considerably smaller than the females, with only a small reddish dot on the abdomen. How do I know I have it? (Symptoms and Diagnosis) What should I do? (Emergency Treatment) How dangerous is it? (Prognosis) Death from spider bites is rare in the United States. Most people recover fully. How can I prevent it? (Prevention) Frequently asked questions (FAQ) Q: Do female black widow spiders really eat their mates?

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