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Red-Shouldered Bug (Jadera haematoloma)

Detailing the identifying qualities of the Red-Shouldered Bug, including physical features and territorial reach.

 Updated: 10/2/2017; Authored By Staff Writer; Content ¬©

  Red-Shouldered Bug  
Picture of Red-Shouldered-Bug
Picture of Red-Shouldered-Bug

The bulbous red eyes on the Red-Shouldered Bug, an uncommon feature in insects, generate a curious interest in this otherwise overlooked insect.

The mostly black Red-Shouldered Bug has bright red edges on its pronotum, the 'shoulder' area of the insect. This vivid red is also seen in the large eyes, an unusual color for most insects. The abdomen edges are also red and may or may not be visibly extended from under the wings. Despite the alarm coloration, this insect is not a threat humans. It is also scentless, meaning it won't spray a noxious chemical when disturbed like other similar-looking insects.

Like many plant bugs, the Red-Shouldered Bug tends to form large congregations around host plants, and even seeks winter shelters inside warm houses and buildings. Because many plants in the Soapberry family are food sources for this type of bug, it is sometimes referred to as a type of Soapberry Bug. They are fond of the sweet sap and fruit from various trees as well and have been seen feeding on figs, plums and cherry trees. Dead insects and food leftovers from humans are also welcome parts of the Red-Shouldered Bug's diet.

This species can be found on or near host plants during the spring, summer and autumn. In warmer regions, a female can produce two broods a year. They are seen almost year round in California, Florida, Texas and Mexico.

Red-Shouldered Bug Information

Category: True Bug
Common Name: Red-Shouldered Bug
Scientific Name: Jadera haematoloma
Other Name(s): Soapberry Bug, Jadera Bug, Goldenrain Tree Bug

Taxonomy Hierarchy

 Arrow graphic Kingdom: Animalia
  Arrow graphic Phylum: Arthropoda
   Arrow graphic Class: Insecta
    Arrow graphic Order: Hemiptera
     Arrow graphic Family: Rhopalidae
      Arrow graphic Genus: Jadera
       Arrow graphic Species: haematoloma

Size, Identifying Tags and Territorial Reach

Size (Adult, Length): Size (Adult, Length): 9 mm to 14 mm (0.351 inches to 0.546 inches)
Identifying Colors: black, red
Additional Descriptors: red eyes, shoulders, edges, sides, flying

North American Territorial Reach (Though Not Limited To): Alabama; Arizona; Arkansas; California; Connecticut; Delaware; Florida; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Vermont; Virginia; West Virginia; Wisconsin; New Brunswick; Newfoundland and Labrador; Nova Scotia; Ontario; Prince Edward Island; Quebec; Mexico

A Note About Territorial Reach: Keep in mind that an insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above. Insects are driven by environmental factors, food supplies and mating patterns and do not nescessarily work within hard-and-fast territorial lines like we humans do.

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