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Stealthy Ground Spider (Cesonia bilineata)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Stealthy Ground Spider



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Dramatic black lines on a light body draw human attention, but the Stealthy Ground Spider's prey never sees it coming.



Updated: 07/15/2021; Authored By Staff Writer; Content ©www.InsectIdentification.org
Stealthy Ground Spiders are web-less hunters. While they create silk-based homes for themselves, they are active hunters. Speed and stealth allow this species to successfully chase down insect prey. The two thick black lines on the barrel-shaped abdomen are easy to see and they reach all the way to the head. While they are natural outdoor hunters, they may wander inside homes, especially inside basements and attics, looking for a meal. Like other spiders, the Stealthy Ground Spider uses venom to help capture and kill its prey, but this venom is not poisonous to humans. The species is not usually interested in human activity and eagerly runs from disturbances.



General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Insect biting icon
Hairy insect icon
Striped or banded insect icon
Venomous insect icon


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Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Gnaphosidae
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          Genus: Cesonia
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            Species: bilineata
Identifying Information
Size, Colors, Features
Scientific Name: Cesonia bilineata
Category: Spider
Size (Adult; Length): 7mm to 15mm (0.27" to 0.59")
Colorwheel Graphic Colors: white, black
Descriptors: stripe, line, mark, albino, hairy, biting, venomous
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Relative Size Comparison
Typical Size Between 7mm (0.3in) and 15mm (0.6in)
Lo: 7mm
Md: 11mm
Hi: 15mm
Territorial Map*
U.S., Canada, and Mexico
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State of North Carolina graphic
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State of South Carolina graphic
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State of Washington graphic
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Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Alaska  
Hawaii  
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Stealthy Ground Spider may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Stealthy Ground Spider. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.

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