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

Black Widow Spiders Latrodectus hesperus Black Widow Spiders Genus: Latrodectus Phylum: Arthropoda Sub Phylum: Chelicerata Class: Arachnida Order: Araneae Sub Order: Labidognatha Family: Therididae Species: 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

2. 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 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 to close Her neurotoxin will take your breath away For then they may be doing your post. 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 L. hesperus L. variolus (Walckenaer). The widow spiders are the most notorious of all spiders. L. geometricus

3. Black Widow Spiders - DesertUSA All about black widow spiders, includes color photos, scientific names, common names, description, behavior, range, habitats and life cycle. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

4. Black Widow Spider areas where black widow spiders may be established. Take proper precautionswear gloves and pay attention to where you are working. Black widow http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

5. Black Widow Spider Black Widow Spider. Araneae Theridiidae, Latrodectus mactans HABITAT black widow spiders are common around wood piles, and are frequently encountered http://www.ext.vt.edu/departments/entomology/factsheets/blackwid.html

Black Widow Spider Contact: Eric Day, Manager, Insect Identification Laboratory August 1996 Black Widow Spider Araneae: Theridiidae, Latrodectus mactans SIZE: About 1 1/2 inches (38mm) long, 1/4 inch (6.4mm) in diameter COLOR: Usually shiny black DESCRIPTION: The female is usually black with a red spot or hourglass- shaped mark on its round abdomen. The male usually has light streaks on its abdomen. HABITAT: Black widow spiders are common around wood piles, and are frequently encountered when homeowners carry firewood into the house. Also found under eaves, in boxes, outdoor toilets, meter boxes, and other unbothered places. TYPE OF DAMAGE: The black widow is not aggressive. It will, however, bite instinctively when touched or pressed. CONTROL: Be very careful when working around areas where black widow spiders may be established. Take proper precautions-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. INTERESTING FACTS: The female eats the male after mating. She hangs belly upward and rarely leaves the web.

6. Black Widow Spider Control, Description, Biology Of Black Widow areas where black widow spiders may be established. Take proper precautions, wear gloves and pay attention to where you are working. Black widow http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

7. Spiders Of NW-Europe black widow spiders, Desert USA Black widows, Arachnology home page. Black Widow Spider, Univ of Michigan Latrodectus species (German) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

8. Black Widow Spider, HYG-2061A-04 are commonly known as widow spiders. A number of different species of widow spiders occur in the United States. The black widow spider (L http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

9. Black Widow Spider- EnchantedLearning.com black widow spiders are extremely poisonous arachnids. They have a black body with a distinctive red, hourglass shape on it. They are not insects. http://www.enchantedlearning.com/subjects/arachnids/spider/Blackwidowprintout.sh

EnchantedLearning.com is a user-supported site. As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages. Click here to learn more. (Already a member? Click here. EnchantedLearning.com Animal Printouts Label Me! Printouts Black Widow Spiders are extremely poisonous arachnids (not insects). Their venom is 15 times as poisonous as the venom of the prairie rattlesnake . These venomous spiders are found in warm and temperate climates all around the world. They live in dark places, in drain pipes, under logs and rocks, etc. in North America from Florida and California to southern Canada. Their bite rarely kills humans. The female will sometimes eat the smaller male after mating. She will lay 300-400 eggs. The spiderlings (baby spiders) are not poisonous but they are cannibals, eating each other. Diet : Black Widows eat flies, moths, crickets, small reptiles and other small animals. Their fangs inject venom and digestive juices into the prey. This kills the prey and also liquifies its flesh, letting the spider eat it easily. Anatomy : Females (about 1 1/2 inches across) have a black body with a distinctive red hourglass shape on the underside of the abdomen. Males are smaller (about 3/4 inch across) with longer legs and red and yellow markings. The females are much more poisonous than the males. Black Widows have a two-part body, strong jaws, poisonous fangs, and a hard exoskeleton.

10. Eight-legged Allies 8. Funnel web spiders look like the brown recluse spider and are just as dangerous. 9. black widow spiders are nonaggressive and rarely bite http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

11. Spiders In And Around The House, HYG-2060-04 Cobweb spiders, including widow spiders, belong to the family Theridiidae and have a rounded globular abdomen (black widow spider shape). http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

12. 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 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?

13. Black Widow Spiders And Other Spiders Of Medical Importance This Web site is devoted to the Black Widow Spider and other spiders of medical importance. A description, illustrations, and medical information is http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

14. Black Widow Spiders In The Low Desert black widow spiders (TheridiidaeLactrodectus sp.) in the Low Desert DESCRIPTION http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

15. Black Widow Spiders In The Low Desert black widow spiders (TheridiidaeLactrodectus sp.) in the Low Desert. Vine Rule The Phoenix Zoo, Black Widow Female Closeup Black Widow eating a beetle http://ag.arizona.edu/maricopa/garden/html/t-tips/bugs/widow.htm

Maricopa County Cooperative Extension Home Horticulture: Environmentally Responsible Black Widow Spiders (Theridiidae:Lactrodectus sp.) in the Low Desert DESCRIPTION: The adult female is glossy black with a bright orange to red hourglass shaped marking on the underside of her abdomen. When mature she measures 1 1/2 inches with legs extended. The males also have the red hourglass marking but are cream and tan in color and much smaller in size. Newly hatched black widows are white with black spots on their abdomens with a cream colored hourglass. Later as they mature they become cream and brown-striped. The black widow requires about 4 months from egg to maturity with the females going through six to nine molts. Over their one to two year life span the females produce several egg sacs, each containing several hundred eggs. Female black widows guard the sac, which resembles a silken cocoon, until the eggs hatch. During this time she is most likely to bite when threatened. Eggs are most frequently encountered from May to October. All stages of both sexes are venomous. Even the egg sacs contain poison.

16. Black Widow Spiders black widow spiders. How do black widow spiders get their name? Females black widow spiders are shiny black when full grown. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

17. Urban IPM: Spiders: Black Widow Spiders A page of the Arizona Urban Integrated Pest Management website on the black widow spider, whose bites are severe enough to warrant medical attention, http://ag.arizona.edu/urbanipm/spiders/blackwidows.html

Urban Integrated Pest Management "Black Widow" Spiders From: R.L. Smith, 1982. Venomous Animals of Arizona. The University of Arizona. Warning: The bite of a "black widow" spider can be life-threatening. If you or someone in your care has been bitten by a "black widow" spider, obtain professional medical assistance as soon as possible. No emergency first aid procedures are recommended for "black widow" spider bites (see first aid instructions Description: The common name black widow spider specifically belongs to the eastern species Latrodectus mactans , which does not occur in Arizona. Latrodectus hesperus , our species, is very similar to the true black widow. The adult female has a shiny black (occasionally dark brown) body approximately 1.5 cm long and slim black legs with a span of about 4 cm. The most famous and easily distinguishable characteristic of this species is the bright red hourglass-shaped marking on the underside of the bulbous female abdomen (Figure 11). Immature females have red, brown, and cream-colored markings on the dorsal surface of the abdomen (Figure 12), and a cream-colored hourglass. Males are much smaller than adult females (about 1/20 the size) and, like immature females, are patterned with red, brown, and cream (Figure 13). Figure 11. Adult female "black widow" spider

18. 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 http://www.doyourownpestcontrol.com/black_widow_spider.htm

Black Widow Spiders Black Widow Spider Identification, Habits, Recommended Measures of Control Black Widow Spiders Information Search DIYPC Information Vault HOME TIPS PRODUCT CATALOG QUESTIONS/ANSWERS-FAQ'S Click Image To Go Directly To The DIYPC Store for Pest Control Products Free shipping on all orders in the U.S.A. (Except the states of Alaska and Hawaii) Feel free to call 1-800-476-3368 if you have any questions! Black Widow Spider Pictures for Identification Black Widow Spider Habits Black Widow Spider Bites Recommended Measures for Control for Black Widow Spiders 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.

19. BLACK WIDOW SPIDERS-CONTROL Black widow identification, habits, bites, recommended measures of control. http://www.doyourownpestcontrol.com/info/pick-black_widow.htm

Black Widow Spiders Identification, Habits, Recommended Measures of Control Spider Information Identification Habits Bites ... Recommended Measures for Control Black Widow is considered a venomous spider 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 is the most easily recognized, her shiny black body giving great contrast to the red hourglass marking on her round abdomen. Adult 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. HABITS The black widow’s range is from Massachusetts to Florida and west to California, Texas, Oklahoma and Kansas. Although they can be found in almost every state (and some portions of Canada)

20. Black Widow Spider (Latrodectus Hesoerus) This is the most likely habitat for hungry black widow spiders. adult male black widow spider adult male black widow, retains youthful makings http://kaweahoaks.com/html/latrodectus_hesoerus.html

Black Widow Latrodectus hesoerus * * images of female, immature and male left - Mature female Black Widow right - Female with penny for size comparison 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. Luckily, they are very sensitive to insecticides and, therefore, easy to control. Immature Black Widow 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 This male specimen was found on the outside of a neighbor's home in mid-October, well after mating season. So he either did not mate

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