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Stream Bluet (Enallagma exsulans)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Stream Bluet.

 Updated: 7/10/2019; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




Small and agile Stream Bluets make the most of warm months far beyond areas with running water.



The Stream Bluet is a type of damselfly in the American Bluet family. Males have a mostly black abdomen. The last segment of the abdomen is completely blue in a mature male, and other segments have a narrow blue band near the joint. Females also have a blue tip at the end of the abdomen. The tubular thorax of both has diagonal lines of color and black. On males, the color is blue; for females, it may be orange, yellow, green, or a combination of theses colors. The area between the eyes of both the male and female also has blue in it. Females have a black abdomen, but the colors on it near the head are extensions of the yellow and green on the thorax. Both sexes have a small dark tile on the upper, outer part of each wing. Legs are pale yellow or blue with thin black lines in the center.

Like other damselflies, the Stream Bluet feeds on small, flying insects. It may be found with other Bluets, and despite its name, it does not restrict itself just to streams. Creeks, lakes, and other water sources are also places to find them. After mating, females go underwater to release fertilized eggs. They may also dab them onto aquatic plants at the water's surface. Flying adults are typically seen resting on foliage or zipping on by from late spring through early autumn.
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Taxonomic Hierarchy
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Odonata
        Family: Coenagrionidae
          Genus: Enallagma
            Species: exsulans
Identifying Information
Scientific Name: Enallagma exsulans
Category: Dragonfly or Damselfly
Size (Adult; Length): 29mm to 38mm (1.13in to 1.48in)
Colorwheel Graphic Colors: blue, green, black, yellow, orange
Descriptors: lined thorax, skinny, fast, blue segment, ninth
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Territorial Reach (A-to-Z)
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
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Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
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Mexico
Note: 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 as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.