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  • Triangulate Cob Web Spider - (Steatoda triangulosa)

    Triangulate Cob Web Spider - (Steatoda triangulosa)

    Triangulate Orb Weavers are not afraid to take down an insect much larger than itself. A good web does the hard work for it.

    Staff Writer (10/8/2015): The triangular pattern on the abdomen helped name this spider. It is a common house spider, hiding in dark corners of rooms or in out buildings like sheds. They are believed to have poor eyesight, depending on the vibrations from their web to find the prey entangled in it.

    Triangulate Orb Weavers feed on a variety of insects as well as other spiders, including the Brown Recluse. They are not known to be aggressive toward people and, possibly due to their tiny size, their venom is not life-threatening to people like that of the potential meals it eats.

    Like most Orb Weaver spiders, it rebuilds all or most of its web daily. A solid construction in spider silk means the web does most of the work for the Triangulate Orb Weaver, allowing the spider to feed on insects and arachnids much larger in size.

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    Details of the:
    Triangulate Cob Web Spider

    Category: Spider
    Common name: Triangulate Cob Web Spider
    Scientific Name: Steatoda triangulosa
    Other Names: Triangulate Bud Spider

      Kingdom: Animalia
       Phylum: Arthropoda
        Class: Arachnida
         Order: Araneae
          Family: Theridiidae
           Genus: Steatoda
            Species: triangulosa

    Size (Adult, Length): 3mm to 6mm (0.12in to 0.24in)

    Identifying Colors: brown; black

    Additional Descriptors: biting, venomous

    North American Reach (Though Not Limited To*): Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Hawaii; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming; Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Nova Scotia; Ontario; Prince Edward Island; Quebec; Saskatchewan; Mexico

    * Keep in mind that an insect's reach is not limited by lines on a map and therefore may appear in areas/regions/states beyond those listed above.

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