1. Black Widow Spiders Latrodectus Hesperus Black Widow Spiders Genus Lactrodectus Phylum Arthropoda Sub Phylum Chelicerata Class Arachnida Order Araneae Sub Order Labidognatha http://www.bliss.army.mil/USACASPage/animals/black_widow_spiders_latrodectus_.ht

Black Widow Spiders Latrodectus hesperus Black Widow Spiders Genus: Lactrodectus Phylum: Arthropoda Sub Phylum: Chelicerata Class: Arachnida Order: Araneae Sub Order: Labidognatha Family: Therididae Species: Geography – Range BlackWidow spiders inhabit most warmer regions of the world to latitude of about 45 degrees N. and S. They occur throughout all 4 deserts of the American Southwest. Related Species Widow spiders (Genus Latrodectus) are the best known and largest of the Cobweb Weavers (Family Therididae). All widows are venomous. Black Widows comprise about 6 species and inhabit most warmer regions of the world to a latitude of about 45 degrees N. The species L. hesperus is common in the western US and is the Black Widow found in the North American deserts. L. mactans is the Black Widow common in the eastern and central US. The Brown Widow Spider, L. geometricus, is also found in the US. L. mactans is found in most warm areas of the world

2. Black Widow Spiders - Associated Content - Associatedcontent.com Biology teachers often teach about organisms that are dangerous. http://www.associatedcontent.com/article/1034804/black_widow_spiders.html

AC.base_www = '/'; AC.base_adm = 'https://publish.associatedcontent.com/'; AC.base_img = 'http://i.acdn.us/'; AC.base_siteimg = 'http://i.acdn.us/siteimg/'; Associated Content Home Lifestyle Home Lifestyle ... Beauty Black Widow Spiders Adjust font-size: Published September 13, 2008 by: Doctorn View Profile Follow Add to Favorites ... Black Widow As a teacher in any area of the country it is important to teach about any organism that may pose a danger to children or adults. One of these is the Black Widow Spider. They are more common than you may think. The adult female is about 1.5 inches in length. In general they move slowly, are a dark shiny black color and have an hourglass shape in red on their underside. There are a variety of different species of "Widow" spiders and they have different markings. The male is about one half the size of the female. The mail may be a dark brown with a yellowish hourglass mark. Juvenile black widow spiders are usually brown with yellow stripes and a yellowish hourglass mark. They most often come out at night, capture a variety of different insects and quickly wrap them in web material and inject their potent poison which acts within minutes. To capture black widow spiders in some areas you might try taking a Styrofoam cup, push a stick into the ground and then put the cup upside down on the stick. Place this "trap" behind bushes in dark shady locations. Check after a few days. Be careful, their bite can be deadly, but are more dangerous to the very young, very old, or people with other health problems. Get treatment quickly if bitten.

3. Black Widow Spiders - DesertUSA All about Black Widow Spiders, includes color photos,video, scientific names, common names, description, behavior, range, habitats and life cycle. http://www.desertusa.com/july97/du_bwindow.html

Home Shop Videos NewsBlog ... Shop DUSA FREE DESERTUSA NEWSLETTER Enter E-Mail address Subscribe Unsubscribe DesertUSA Quick Links Home Animals Colorado River Info Deserts ... Wildflower Reports 2010 Staff Blogs Desert Road Trippin' News Blog Shutterbug 101 Lara's Lane Reader Blogs Agua Caliente Band of Cahuilla Indians David J. Wood Discover Southern Nevada Mitch on the Move Mojo on the Mojave Desert Denizens Hotel Reservations Black Widow Spiders Latrodectus hesperus Black Widow Spider: Spider Bites Prevention Video Overview Description/Identification Females are about .5 inches long, 1.5 inches when the legs are spread. Females and males have a shiny, globular abdomen Females and males are black and sometimes brown Females usually have a reddish hourglass shape on the underside of her abdomen. Some species have a series of red spots and two crosswise bars on the underbelly. Males about half the female's size, with smaller bodies, and longer legs Males usually have yellow and red bands and spots over the back as do the immature stages. Newly hatched spiderlings are predominately white or yellowish-white, gradually acquiring more black and varying amounts of red and white with each molt.

4. Spiders Appearance Female is 1/2 inch long; shiny black, with hourglass shape read mark on underside of abdomen. Habits Can be found almost anywhere, indoors or out; prefer to http://landerspestcontrol.com/Spiders.htm

Ants Beetles Booklice Centipedes ... Silverfish [ Spiders ] Termites Ticks Black Widow Spiders Brown Recluse Spiders Click on picture for larger image 500 x 245 (80 k) Black Widow Spiders (Genus Latrodectus) Appearance: Female is 1/2 inch long; shiny black, with hourglass- shape read mark on underside of abdomen. Habits: Can be found almost anywhere, indoors or out; prefer to build their nests close to the ground. Diet: Insects trapped in web made by female. Reproduction: Contrary to popular belief, female is usually unsuccessful in any attempt to eat male after mating; 300 - 400 eggs are laid in silken cocoon, hatch in about 10 days. Other Info: Black Widows are not aggressive, and will not bite unless provoked. However, they are poisonous. If bitten, seek medical attention; bites are rarely fatal. Go to Top Brown Recluse Spiders (Loxosceles Recluse) Appearance: Yellowish to brown, with a dark brown violin-shaped dorsal marking; 5/8 to 1 inch long. Habits: Can be found outside under rocks, leaves, debris, bark, wood piles; found inside in storage areas such as closets, attics; usually found close to the ground.

5. Black Widow Spider Bite Symptoms, Diagnosis, Treatment And Prevention On EMedici Information on the symptoms and treatment of black widow spider bites. http://www.emedicinehealth.com/articles/6436-1.asp

Home Topics A-Z Slideshow Pictures Image Gallery ... Pet Slideshows Featured Slideshow Breast Cancer A Visual Guide to Breast Cancer View Slideshow Image Gallery (categories) ... Additional Skin Conditions Featured Image Picture of Psoriasis A reddish, scaly rash often located over the surfaces of the elbows, knees, scalp, and around or in the ears, navel, genitals or buttocks... View Image Gallery Quizzes ... eTools Featured Quiz Fat and Fats Quiz Everyone is talking about the importance of cutting back on fat. But why? What's the harm in a little fat? View Quiz About Us ... Site Map November 14, 2010 home topics a-z list black widow spider bite article Font Size A A A Glossary ... Next Page Black Widow Spider Bite Black Widow vs. Brown Recluse Spiders Slideshow Pictures Bad Bugs and Their Bites Slideshow Pictures Bites and Infestations Image Gallery Black Widow Spider Bite Overview ... Bites and Infestations - Image Gallery Black Widow Spider Bite Overview Of the 30,000 types of spiders, the black widow is probably the one best known and feared. Although spiders are often blamed for all kinds of symptoms, from local itching to diffuse rashes, the fact is that spiders rarely bite humans, and in fact, most spider bites do not even break the skin. The bites of very large spiders such as tarantulas can be painful. Otherwise, in the temperate regions, the only spiders to be feared are the black widow and the

6. Latrodectus - Wikipedia, The Free Encyclopedia The black widow spiders are perhaps the bestknown members of the genus.The injection of neurotoxic venom from these species is a comparatively dangerous spider bite, resulting in http://en.wikipedia.org/wiki/Black_widow_spider

Latrodectus From Wikipedia, the free encyclopedia   (Redirected from Black widow spider Jump to: navigation search Latrodectus Scientific classification Kingdom: Animalia Phylum: Arthropoda Class: Arachnida Order: Araneae Family: Theridiidae Genus: Latrodectus Walckenaer Species Approx. 31, see article Latrodectus is a genus of spider, in the family Theridiidae , that contains approximately 31 recognized species . The common name widow spiders is sometimes applied to members of the genus due to the supposed habit of the female of eating the male after mating, although the males of most species are not actually usually eaten after mating, and can even go on to fertilize other females. The black widow spiders are perhaps the best-known members of the genus.The injection of neurotoxic venom Latrotoxin from these species is a comparatively dangerous spider bite , resulting in the condition Latrodectism which is named for the genus. The female black widow's bite is particularly harmful to humans because of its unusually large venom glands. Contents Description Strength of Latrodectus silk Species America ... Europe, North Africa, the Middle East, and western Asia

7. Getting Rid Of Black Widow Spiders Getting Rid of Black Widow Spiders. Is it dangerous to smash a female black widow spider in your home? http://www.thriftyfun.com/tf462267.tip.html

8. Black Widow Spiders, Black Widow Spider Pictures, Black Widow Learn all you wanted to know about black widow spiders with pictures, videos, photos, facts, and news from National Geographic. http://animals.nationalgeographic.com/animals/bugs/black-widow-spider.html

9. BLACK WIDOW SPIDERS Facts BLACK WIDOW SPIDERS Lactrodectus mactans. Color Black, with characteristic red hourglass on back Legs Eight Shape Round Size 3/4 length; 3/8 in diameter http://www.not1bug.com/blackwidowspiders.html

10. Black Widow Spider, HYG-2061A-04 Discusses the spider, bite symptoms, and first aid. http://ohioline.osu.edu/hyg-fact/2000/2061A.html

Ohio State University Extension Fact Sheet Entomology 1991 Kenny Road, Columbus, OH 43210-1000 Black Widow Spider HYG-2061A-04 Susan C. Jones, Ph.D. Assistant Professor of Entomology Female black widow spider with egg sac. Class: Arachnida Order: Araneae Family: Theridiidae Common Name Scientific Name black widow spider Latrodectus mactans Species in the genus Latrodectus are commonly known as widow spiders. A number of different species of widow spiders occur in the United States. The black widow spider ( L. mactans ) and the northern black widow spider ( L. variolus ) occur in Ohio, although both are relatively uncommon, especially in the northern half of the state. Other species of widow spiders occasionally arrive in shipments of household goods. The black widow spider has a potent neurotoxic venom and is considered the most venomous spider in North America. However, the female injects such a small dose of venom that it rarely causes death. Reports indicate human mortality at well less than 1% from black widow spider bites. Identification The adult female black widow spider has a shiny, jet black, spherical abdomen with two connected red triangles on the underside that form a characteristic hourglass marking. Note, however, that the hourglass color may range from yellowish to various shades of orange or red. Adult females are about 1/2-inch long, not including the legs (about 1-1/2 inches when legs are spread). Adult males are harmless, about half the female’s size, with smaller bodies and longer legs. The male’s abdomen usually has red spots along the upper midline and white lines or bars radiating out to the sides. Newly hatched spiderlings are predominately white or yellowish-white, gradually acquiring more black and varying amounts of red and white with each molt. Juveniles of both sexes resemble the male and are harmless.

11. Black Widow Spiders BLACK WIDOW SPIDERS How do black widow spiders get their name? Females black widow spiders are shiny black when full grown. Since the females commonly eat their mate after http://cecalaveras.ucdavis.edu/bwidow.htm

BLACK WIDOW SPIDERS How do black widow spiders get their name? Females black widow spiders are shiny black when full grown. Since the females commonly eat their mate after mating (as do many other spiders) they often are widows. How do you identify widow spiders? What do the eggs of widow spiders look like? Eggs of widow spiders are laid in an egg sack, attached to the web of the mother. The sack is pear shaped, and creamy yellow, light gray, or light brown in color. About 200 eggs may be laid in an egg sack and females may produce several egg sacks if conditions are favorable. Where do you find black widows? Widow spiders prefer to nest near the ground, in dark, undisturbed areas. Nest sites often are near holes produced by small animals, or around construction openings and wood piles. Low shrubs also are common sites for widows to occur. Indoors, widows similarly occur in dark, undisturbed sites such as behind furniture or under desks. Undisturbed basement areas and crawl spaces of homes are also used by nesting widow spiders. What are the symptoms of poisoning by widow spiders?

12. Black Widow Spiders - Garden -Trees, Grass, Lawn, Flowers, Irrigation, Landscapi Originally Posted by ExPit The Ortho spray makes sense to me, and I do see a pretty nice sized crack in the wall where they may be nesting, but tell http://www.city-data.com/forum/garden/455955-black-widow-spiders-2.html

City-Data Forum General Forums Garden Black Widow Spiders User Name Remember Me? Password Mark Forums Read Welcome to City-Data.com forum! Make sure to register - it's free and very quick! You have to register before you can post and participate in our discussions with 900,000 other registered members. User profiles and some forums can only be seen by registered members. After you create your free account you will be able to customize many options, you will have the full access to over 15,000 posts/day about local topics and you will see fewer ads. Jump to a detailed profile or search site with Search Forums Advanced Business Search 14 Million verified businesses Search for: near: Page 2 of 2 10-08-2008, 01:42 PM canibeyou ^ My name v Stuff I say Join Date: Jun 2006 Location: Not tied down... maybe later! *rawr* 2,665 posts, read times Reputation: 3965 Quote: Originally Posted by ExPit The Ortho spray makes sense to me, and I do see a pretty nice sized crack in the wall where they may be nesting, but tell ya the truth I'm a little afraid to spray in there because that might scare them into the house. Is this a real possibility? I appreciate all your help. Oh and canibeyou, is there any special kind of Ortho bug spray that I should get for this? Thanks.

13. Black Widow Spider: MedlinePlus Medical Encyclopedia Includes photographs, bite symptoms, treatment, and prevention. http://www.nlm.nih.gov/medlineplus/ency/article/002858.htm

Skip navigation A service of the U.S. National Library of Medicine National Institutes of Health Home About MedlinePlus ... Contact Us Search MedlinePlus Health Topics ESPAÑOL Black widow spider The black widow spider ( Latrodectus mactans) has a shiny black body with a red hourglass-shape on the belly area. The bite of a black widow spider is poisonous. This is for information only and not for use in the treatment or management of an actual poison exposure. If you have an exposure, you should call your local emergency number (such as 911) or the National Poison Control Center at 1-800-222-1222. Poisonous Ingredient The venom of the black widow spider contains poisonous chemicals that make people sick. Where Found Black widows are found throughout the United States but predominantly in the South and West. They are usually found in barns, sheds, stone walls, fences, woodpiles, porch furniture, and other outdoor structures. Symptoms This first symptom is usually pain similar to a pinprick. This sensation is felt when the bite is actually made. Some people may not feel it. There may be minor swelling, redness, and a target-shaped lesion. Fifteen minutes to an hour later, a dull muscle pain spreads from the bite area to the entire body.

14. Black Widow - Wikipedia, The Free Encyclopedia Black widow is a common name of some spiders in the genus Latrodectus. Black Widow may also refer to http://en.wikipedia.org/wiki/Black_widow

Black Widow From Wikipedia, the free encyclopedia   (Redirected from Black widow Jump to: navigation search Look up black widow in Wiktionary , the free dictionary. Black widow is a common name of some spiders in the genus Latrodectus Black Widow may also refer to: Contents Aircraft Fiction Film and television Gaming ... edit Aircraft P-61 Black Widow , a World War II aircraft Northrop YF-23 Black Widow II, a prototype fighter aircraft edit Fiction Several comic book characters, including: Black Widow (Claire Voyant) , a 1940s comic book character Black Widow (Natalia Romanova) , aka Natasha Romanoff, a Marvel Comics character Black Widow (Yelena Belova) , a Marvel Comics character appearing in 1999 Black Widow: A Novel , a 1981 novel by Christina Crawford Natasha Kerensky, a BattleTech character also known as "The Black Widow" edit Film and television Black Widow (1954 film) , starring Ginger Rogers and Gene Tierney Black Widow (1987 film) , featuring Debra Winger and Theresa Russell Black Widow (2005 film) , a Canadian film starring Sarah Slean Black Widow (2007 film) , with Elizabeth Berkley and Alicia Coppola The Black Widow (serial) , a 1947 movie serial starring Bruce Edwards The Black Widow (1951 film) , a British film starring Christine Norden The Black Widow, a

15. Black Widow Spiders - Ask.com Top questions and answers about BlackWidow-Spiders. Find 6606 questions and answers about Black-Widow-Spiders at Ask.com Read more. http://www.ask.com/questions-about/Black-Widow-Spiders

16. Black Widow Spiders And Other Spiders Of Medical Importance Brief information on the black widow and brown recluse; links to related web sites. http://members.tripod.com/~LouCaru/index-13.html

Black Widow Spiders and Other Spiders of Medical Importance Build your own FREE website at Tripod.com Share: Facebook Twitter Digg reddit document.write(lycos_ad['leaderboard']); document.write(lycos_ad['leaderboard2']); Web Gateway For Links on The Widow Spiders The Black Widow So beautiful, so filled with wonder You have class with the Arachnids Latrodectus mactans is your scientific name Your venomous bite is what gives your fame Beware of her sting, she'll get you on the arm Fall not for her false lustrous black charm Avoid her at all costs, don't get too close Her neurotoxin will take your breath away For then they may be doing your post. The Widow Spiders The widow spiders belong to the genus Latrodectus . There are five species found in North America north of Mexico. The black widow for many years was considered to be a single species but since is now recognized to be represented by three species, which are very similar in appearance and habitat. These three widow spiders are the Southern black widow Latrodectus mactans (Fabricius), the Western black widow

17. Black Widow Spiders And Black Widow Spider Pictures Specializing in black widow spiders, Do It Yourself Pest Control provides the products and expertise you need for residential and commercial control of spiders http://doyourownpestcontrol.com/black_widow_spider.htm

Home Black Widow Spiders Black Widow Spider Identification, Habits, Recommended Measures of Control General Spider Information Product Search: Ask Us-Faq's Pest Information Contact Us Black Widow Spider Pictures for Identification ... Spider Control Products Black Widow Spiders are considered venomous spiders in North America. Black Widow spiders are not usually deadly, especially to adults, because they inject only a small amount of venom. Despite its reputation, this spider often attempts to escape rather than bite, unless it is guarding an egg mass or if it is cornered and pressed. After mating, the female sometimes eats the male, earning the name "widow." IDENTIFICATION FEMALE BLACK WIDOW The female black widow spider is the most easily recognized, her shiny black body giving great contrast to the red hourglass marking on her round abdomen. Adult black widow spider males are harmless, about half the female's size, and usually have yellow and red bands with spots on their backs. The legs of the male are much longer in proportion to his body than that of the female, with it's body half the size.

18. Venomous Creatures Of Georgia Black Widow Spiders. Phylum Arthropods Class Scorpions, ticks, mites, harvestmen, and spiders. Order True Spiders Family Theridiidae http://library.thinkquest.org/04oct/00525/blackwidow.htm

Black Widow Spiders Phylum: Arthropods Class: Scorpions, ticks, mites, harvestmen, and spiders Order: True Spiders Family: Theridiidae People in Georgia, such as gardeners or just a little kid playing in their backyard, may have an encounter with a black widow because these spiders are found in dark or small spaces, such as under rocks or in between two fence posts. The female spider has a red hour glass on her back and is the black widow that is venomous. The male is NOT! The black widow spider is one of the two spiders in Georgia that is venomous. Remember, a black widow spider is NOT out to get you if you don't bother it. Even though it may seem like they are, they aren't. A black widow will only use its venom if it really needs too. Click on the picture to learn more about the effects of the bite and facts about the black widow spider!

19. Widow Spiders Factsheet from Clemson University describes the brown widow and the northern and southern black widow spiders, the type of injury inflicted by bites and spider control. http://entweb.clemson.edu/eiis/pdfs/mv14.pdf

20. Black Widow Spider Black Widow Spiders The Black Widow spider (Latrodectus) is represented by five species in North America north of Mexico. Two of these species, the brown widow (L. geostricus http://kaston.transy.edu/widow.html

Black Widow Spiders The Black Widow spider ( Latrodectus ) is represented by five species in North America north of Mexico. Two of these species, the brown widow ( L. geostricus ) and the red-legged or red widow ( L. bishopi ), are restricted to a southern distribution. The red widow appears to be found only in southern Florida. The remaining black widow species were historically considered to be only one species but are now recognized as three distinct species . Identification is based upon the pattern of red coloration on the underside of their abdomen and by their geographical distribution, although the northern and southern black widows may coexist in some states. The Venom Although almost all spider species possess poison only a few species produce a venom virulent to be harmful to humans. Black widows are very timid spiders and are not known to agressively bite humans. However, the venom of black widows is a neurotoxin and it may interfere with the nerve impulses to muscle tissue. After being biten from a black widow one may feel painful rigidity in the muscles of the abdomen and a feeling of tightness in the chest. Other symptoms include an increase in blood pressure, a rise in body temperature, nausea, and sweating. Death is uncommon (less than 1% of the reported cases), but in the elderly or very young death may occur from asphyxia 14-32 hours after being bitten. Seek medical attention if you suspect you have been bitten. Without medical attention the symptoms can last 5 days and a complete recovery may take weeks.

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