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Northern black widow spider

Northern black widow spider

Latrodectus variolus

A species of Widow spiders, Also known as Northern widow

The northern black widow spider (Latrodectus variolus) matches other black widow spiders (Latrodectus) in appearance. The difference in this one is that the hourglass appears broken on the northern black widow spider. A bite is dangerous and can cause pain, rigid muscles, and vomiting. It is heavily suggested to seek out a doctor if bitten.

Toxic to Humans
Toxic to Humans
Toxic to Animals
Toxic to Animals
Bite Humans
Bite Humans
General Info About Northern black widow spider
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Attributes of Northern black widow spider
Colors
Black
Red
Habitat
wood; stump; wall
Adult Food Sources
Insects, arachnids, woodlice, diptera (such as flies), lepidoptera (such as moths)
Venomous
The Northern black widow spider can induce toxic reactions varying in severity. Nevertheless, these toxins primarily target their prey and predators and are usually not fatal to humans.
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
The Northern black widow spider typically preys on other arthropods and does not directly affect plants.
Biting animal or pet
Yes
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Species Status of Northern black widow spider
It is commonly found in Middle Atlantic states of the United States. It is also found, rarely, in southern Ontario and southern Quebec, Canada, and in south-eastern Michigan.
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Distribution Area of Northern black widow spider
Canada, Florida
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Adult Size of Northern black widow spider
4 - 10 mm
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Interesting Facts About Northern black widow spider
The northern black widow spider has a unique silk, stronger than other spider types, used to create unusually elastic and robust webs.
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Scientific Classification of Northern black widow spider
Tips for Finding Northern black widow spider
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Youth Habitat of Northern black widow spider
Forests and Woodlands, Grasslands and Prairies, Urban and Suburban Areas, Deserts and Arid Regions
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Adult Habitat of Northern black widow spider
Forests and Woodlands, Grasslands and Prairies, Urban and Suburban Areas, Deserts and Arid Regions
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How Can You Attract Northern black widow spider
Generally, northern black widow spider doesn’t require trap food as they are predators that build webs to catch their prey. However, small insects can be used to lure them if needed.
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How and Where Can You Find Northern black widow spider at Different Life Stages
Juvenile Northern black widow spider juveniles are smaller and their webs may be located closer to the ground in sheltered, undisturbed areas. Look for them in garden sheds, woodpiles, or under rocks.
Adult Northern black widow spider adults are larger and tend to build their webs in more permanent, protected locations. Check garages, basements, and outdoor structures like outhouses. Carefully inspect corners and crevices where webs are likely to be found.
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Harmful Effects of Northern black widow spider
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Toxic to Humans
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Toxic to Animals
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Bite Humans
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Toxic to Humans

Northern black widow spider possesses neurotoxic venom, delivered through fangs when it bites in defense or while securing prey. The venom can cause severe pain, muscle cramps, and spasms. Symptoms often resolve without long-term effects, but severe cases can lead to respiratory difficulties and require medical attention.

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Toxic to Animals

Northern black widow spider, an arachnid, can administer venom through a bite using its fangs. While toxicity can range from mild to severe, it generally affects the nervous system. Humans, domesticated animals like dogs and cats may experience pain, swelling, or muscle rigidity upon being bitten. Smaller creatures could potentially succumb to the venom depending on dosage and individual susceptibility.

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Bite Humans

Northern black widow spider bites humans typically in self-defense, when threatened or accidentally disturbed. Bites involve venom injection and can lead to severe pain, muscle cramps, and other systemic symptoms. However, these spiders are not aggressive and bites are rare, with females more likely to bite due to their larger venom glands.

More Effects of Northern black widow spider

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