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Assassin Bug (Sirthenia carinata)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Assassin Bug



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This long and lean Assassin Bug is an adept predator of insects thanks to stealth and a stiletto.



Updated: 01/26/2021; Authored By Staff Writer; Content ©www.InsectIdentification.org
The black and orange colors on Sirthenia carinata serve as a warning to approach with caution, if at all. Like other members of the Assassin Bug family, this species has a long fang at the front of the face. It is used to stab insects to death so they can then be devoured. Sometimes, the fang is used in defense when under threat, like from a careless human handler, delivering a painful wound. Juveniles are somewhat different in appearance: red overall with black dashes on their abdomen. They molt as they grow and develop, changing shape and color. Adults are black with orange color at the narrow center, or middle part, of the insect. The orange-brown legs are thick and strong. The black head sports an orange dagger-like fang, folded down until ready for use.

Thanks to a varied diet of insects, this kind of bug is a good one to have around in a garden or farm. It will help eliminate pests and control the population sizes of other larval and adult insects that tend to feed on fruits, vegetables, and herbs.




General Characteristics
Capability, Shape, Texture/Pattern, Benefits, Dangers
Insect biting icon




Taxonomic Hierarchy
Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Hemiptera
        Family: Reduviidae
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          Genus: Sirthenia
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            Species: carinata
Identifying Information
Size, Colors, Features
Scientific Name: Sirthenia carinata
Category: True Bug
Size (Adult; Length): 20mm to 25mm (0.78" to 0.98")
Colorwheel Graphic Colors: black, orange
Descriptors: slender, narrow, long, fang, biting, orange middle
Relative Size Comparison
Typical Size Between 20mm (0.8in) and 25mm (1.0in)
Lo: 20mm
Md: 22.5mm
Hi: 25mm
Territorial Map*
U.S., Canada, and Mexico
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Territory map graphic of the country of Mexico
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Alaska  
Hawaii  
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Assassin Bug 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 Assassin Bug. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.

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