Black Widow Spider Facts
Kingdom:
Five groups that classify all living things...
Black widow spiders are considered one of the most poisonous spiders in North America. They are also the largest web-spinning spiders.
Black Widow Spider
The Black Widow Spider weighs about 1 gram and is only 2 inches long. But it is the most poisonous spider in North America! Only the adult females carry venom; males and young black widows are harmless.
Black Widow Spider Range
Fast Facts
Type: Bug Diet: Carnivore Average life span in the wild: 1 to 3 years Size: 1.5 in (38 mm) long, 0.25 in (6.4 mm) in diameter Weight: .
The black widow spider is a spider notorious for its neurotoxic venom. It is a large widow spider found throughout the world and commonly associated with urban habitats or agricultural areas.
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.
The Black Widow Spider is the only spider in Alberta that is potentially harmful to people. A bite is highly unlikely to be fatal but may be extremely painful and unpleasant. At one time, Black Widow spider bites were more common than they are now.
The Black Widow spider is common throughout the southern United States. Webs can be found in undisturbed, recessed areas including woodpiles, garages, fence rows, debris and abandoned animal burrows.
Natural History ...
All black widow spiders are venomous, since they use their venom to subdue and and eat their prey. But only adult females seem to be able to harm humans with their bite.
View Video about The Black Widow Spider. The female black widow spider is the most venomous spider in North America, but it seldom causes death to humans, because it only injects a very small amount of poison when it bites.
A Relative
The Black Widow Spider of the United States is a close relative of the Redback spider.
: Adult female black widow spiders are usually black and shiny. They are most commonly recognized by the reddish hourglass shape on the underside of the abdomen. The abdomen is quite round. The western black widow female's body is about 1.
Find out how long a Black Widow Spider lives. See a stick that actually walks! And, take time to find all you can about a Giant Cockroach! ...
Juvenile fence lizards are preyed upon by many other animals, including the black widow spider. © Rory Doolin
Adult, Solano County
Some Characteristics Useful In Separating Western Fence Lizards from Common Sagebrush Lizards ...
Cobras, stonefish, black widow spiders and scorpions use neurotoxins. Other venom (hemotoxin) attacks the circulatory system, causing pain, swelling and changes in the blood. Rattlesnakes, vipers and some spiders use hemotoxins.
Lactrodectus tredecimguttatus - Black widow spider
Subphylum Uniramia (Uniramians)
Superclass Insecta ...
Coremiocnemis (Coremiocnemis jeremyhuffi)
Peacock parachute spider (Poecilotheria metallica)
Black widow spider (Latrodectus mactans)
Wolf spider (Pardosa amentata)
Mexican redrump tarantula (Brachypelma vagans) ...
Occasional fatal cases, which result from respiratory paralysis, are usually limited to children. The most effective treatment is an antivenin. Black widow spiders are classified in the phylum Arthropoda, class Arachnida, order Araneae, ...
The bites of some spiders and the stings of a few species of scorpions are dangerously poisonous to humans (see Black Widow Spider, Brown Recluse Spider).
 See also: Spider, Widow, Black Widow, Snake, Scorpion
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