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Nothern yellow sac spider

Nothern yellow sac spider

Cheiracanthium mildei

A species of Yellow sac spiders, Also known as Yellow sac spider, Prowling spider, Yellow house spider, Milde's yellow sac spider

The nothern yellow sac spider can be spotted with a light source at night due to their small, reflective eyes. These spiders do not use their webs to catch prey, but rather as a hideout spot during the day. At night, they leave their web to hunt their prey. This is one of the most common spiders that bite humans in the Northeastern United States.

Toxic to Humans
Toxic to Humans
Toxic to Animals
Toxic to Animals
Bite Humans
Bite Humans
General Info About Nothern yellow sac spider
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Attributes of Nothern yellow sac spider
Habitat
leafy vegetation; indoors and outdoors
Adult Food Sources
Insects, small arthropods, moths, flies, crickets
Larva Food Source
Small insects, small arthropods, mites, insect larvae, aphids
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
The Nothern yellow sac spider has special defensive behaviors that can trigger an allergic reaction. If there are serious reactions, seek IMMEDIATE medical attention.
Venomous
The Nothern yellow sac 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
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Species Status of Nothern yellow sac spider
It is widespread across the Northeastern United States and Eastern Canada, as well as most of Northern Europe. The American species is thought to have been introduced there from Europe by the English colonists.
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Adult Size of Nothern yellow sac spider
8 - 10 mm
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Predators of Nothern yellow sac spider Larvae
Frogs, toads, birds, jumping spiders, mantises, dragonflies
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Predators of Adult Nothern yellow sac spider
Birds, reptiles, larger spiders, centipedes, small mammals
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Interesting Facts About Nothern yellow sac spider
Nothern yellow sac spider can regulate its body temperature by changing its body color, aiding in both thermoregulation and concealment.
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Scientific Classification of Nothern yellow sac spider
Tips for Finding Nothern yellow sac spider
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Youth Habitat of Nothern yellow sac spider
Forests and Woodlands, Urban and Suburban Areas, Agricultural and Cultivated Areas
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Adult Habitat of Nothern yellow sac spider
Forests and Woodlands, Urban and Suburban Areas, Agricultural and Cultivated Areas
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What is the Best Weather to Observe Nothern yellow sac spider
Warm and humid conditions are most suitable for finding nothern yellow sac spider as they prefer environments that support their prey and allow for easier web-building.
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How and Where Can You Find Nothern yellow sac spider at Different Life Stages
Juvenile Juvenile nothern yellow sac spider are often found in slightly more hidden locations such as under rocks or leaf litter. Searching in these areas and carefully turning over potential hiding spots can reveal their presence.
Adult Adult nothern yellow sac spider are more mobile and may be found on the move or within their webs during the night. Spotting can be done with a flashlight or headlamp, focusing on shrubs, grassy fields, and the periphery of building exteriors.
Egg Nothern yellow sac spider egg sacs are typically secured in sheltered areas or on the web itself. They can be identified by looking for small, silk-wrapped bundles that are sometimes off-white or light brown in color.
Are Nothern yellow sac spider harmful?
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Harmful Effects of Nothern yellow sac spider
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Toxic to Humans
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Bite Humans
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Toxic to Humans

Nothern yellow sac spider, a spider species, has mild venom that can affect humans. The venom contains neurotoxins that may cause localized pain, redness, and swelling. Although not typically dangerous, the bite delivers these toxins via fangs as a defense mechanism. Long-term effects are rare, but severe cases might involve mild systemic symptoms.

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Toxic to Animals

Nothern yellow sac spider harbors venom that it may administer through its fangs, a trait primarily used in self-defense or prey capture. Typically, given its mild toxicity level, encounters with nothern yellow sac spider are usually not life-threatening for larger animals such as humans, dogs, or cats. However, small rodents and smaller animals can experience more profound effects due to their relatively smaller body mass. The venom's impact varies across species, causing discomfort and distress upon envenomation.

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Bite Humans

Nothern yellow sac spider may bite humans when feeling threatened, specifically in defense. The bite, delivered through fangs, occurs upon unintentional contact or provocation. Typically, adults are involved in these interactions, and while the bite can be painful, the consequences are generally mild and not life-threatening.

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