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Arrowhead Orb Weaver (Verrucosa arenata)

Detailing the physical features, habits, territorial reach and other identifying qualities of the Arrowhead Orb Weaver

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A bright yellow triangle on a pyramidal abdomen is the unique trademark of an Arrowhead Orbweaver Spider.

Updated: 01/02/2022; Authored By Staff Writer; Content ©www.InsectIdentification.org
It is unusual to see a spider with an abdomen that is not round, especially in the Orbweaver family. Orbweavers are part of a huge family of spiders in North America. The round-shaped webs created by these spiders form a delicate spiral. Silk threads radiate from the center, and many species rebuild their webs every day. The star of the novel "Charlotte's Web" was an Orbweaver Spider. The Arrowhead Orbweaver, however, looks a bit different from its relatives.

While more common varieties of Orbweavers have a bulbous abdomen, this species does not. Its abdomen is shaped like the tip of an arrow: triangular and pointy. A bright yellow or white triangle is stamped on the top of this abdomen making it easy to see and identify. Some smaller, vein-like markings on this area are red. The color of the body is reddish-brown though shades may vary depending on the individual. Though variations exist, generally the color pattern is the same among Arrowhead Orbweaver Spiders living in the same area.

This spider creates webs in shady areas of a forest and sits on it with its head up. This is also a departure from the norm among Orbweavers as most others sit in their webs up-side down. The legs are tucked in at their sides, taking up as little space as possible, while it sits and waits for prey. Like other spiders, once an insect wanders into its web, the spider immobilizes it with a venomous bite and eats it later. Arrowhead Orbweavers are most active in middle and late summer. They can be found in wooded forests, hiding in the darker, shaded areas so tread carefully through these places. ©InsectIdentification.org

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General Characteristics

Capability, Shape, Texture/Pattern, Benefits, Dangers
Venomous insect icon

Taxonomic Hierarchy

Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Araneidae
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          Genus: Verrucosa
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            Species: arenata

Identifying Information

Size, Colors, Features
Scientific Name: Verrucosa arenata
Other Name(s): Triangulate Orbweaver
Category: Spider
Size (Adult; Length): 5mm to 6mm (0.19" to 0.23")
Colorwheel Graphic Colors: red; brown; yellow; white; pink
Descriptors: pointy; arrow; triangle; pyramid; patch; tucked; venomous

Relative Size Comparison

Typical Size Between 5mm (0.2in) and 6mm (0.2in)
Lo: 5mm
Md: 5.5mm
Hi: 6mm

Territorial Map*

U.S., Canada, and Mexico
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Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Arrowhead Orb Weaver 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 Arrowhead Orb Weaver. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.
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