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Twinflagged Jumping Spider (Anasaitis canosa)

Detailing the physical features, habits, territorial reach and other identifying qualities of the Twinflagged Jumping Spider

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Image Credit: Arch Baker
Full-sized image of the Twinflagged-Jumping-Spider Thumbnail image of the Twinflagged-Jumping-Spider
Image Credit: Arch Baker
Full-sized image #2 of the Twinflagged-Jumping-Spider Thumbnail image #2 of the Twinflagged-Jumping-Spider

Two white spots on the pedipalps of the Twinflagged Jumping Spider look like white flags of surrender when it waves them in circles.

Updated: 07/15/2021; Authored By Staff Writer; Content ©www.InsectIdentification.org
The remarkable feature that gives this spider its name is found on its pedipalps. Though they look like a 5th pair of legs by the face, they are not. These appendages are not for walking. Instead, they are used to help sense the environment. A joint on each dark pedipalp has a bright white spot on it. The spider curls each pedipalp under and then moves them in small circles, as if it is waving those little white spots like flags or handkerchiefs. The small Twinflagged Jumping Spider is mostly black with two or four white marks on its cephalothorax (head plate). There are some variations among the species, but a few features are consistent between them. Though the abdomen may be smaller in some individuals, it comes to a point at the tip, and has a white dash right in the center. A large, perhaps faded, white ring encircles this dash, and some light colored chevrons may break the ring as they stretch from the dash to the end of the body. Legs are lighter-colored with dark bands.

Like all other spiders in the Salticidae family, the Twinflagged Jumping Spider pounces on insect prey. It does not create a web for catching food. It is almost always on the move and can be seen on the forest floor, leaf litter, rocks, leaves or stems of plants and even man-made items like cables and decks. Sometimes it may wander inside while searching for a meal, but it is not troublesome or dangerous to people. Its tremendous leaping ability also helps the spider escape from threats, or people who are too close. Small, but fast, the Twinflagged Jumping Spider is a fun spider to watch.

General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Fast insect icon
Hairy insect icon
Jumping insect icon


Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Arachnida
      Order: Araneae
        Family: Saliticidae
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          Genus: Anasaitis
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            Species: canosa
Identifying Information
Size, Colors, Features
Scientific Name: Anasaitis canosa
Category: Spider
Size (Adult; Length): 4mm to 10mm (0.15" to 0.39")
Colorwheel Graphic Colors: black; white; brown
Descriptors: two, double, dash, semicolon, jumping, hairy, fast, small

Relative Size Comparison
Typical Size Between 4mm (0.2in) and 10mm (0.4in)
Lo: 4mm
Md: 7mm
Hi: 10mm
Territorial Map*
U.S., Canada, and Mexico
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
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State of Maine graphic
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State of Minnesota graphic
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State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
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
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Twinflagged Jumping 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 Twinflagged Jumping Spider. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.


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