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Giant Darner (Anax walsinghami)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Giant Darner.

 Updated: 5/23/2018; Authored By Staff Writer; Content ¬©www.InsectIdentification.org




The longest and largest dragonfly in the U.S., the beneficial and beautiful Giant Darner is hard to miss.



The Giant Darner is hailed as the largest example of dragonfly found in the United States of America. This dragonfly can measure about 5" in length with a mighty wide wingspan of up to 5" as well. Highly identifiable by their blue and black coloring, the Giant Darner will not escape your attention when it comes zipping by.

The Giant Darner appears similar to the Common Green Darner (detailed elsewhere on this website) and shares its large size and interesting coloring pattern. The Giant Darner differs from the Common Green Darner by having a much longer abdomen. The Giant Darner's abdomen is more than twice the length of its body while the Common Green Darner's 'tail' is about the same length of its body. Giant Darners have a green thorax and the top of the abdomen is bright blue. The brown-black, slender part of the abdomen has bright blue along the dorsal side ('spine'). The long abdomen has a slight curve to it that bends upward. Large eyes are set on a yellow face.

Giant Darners can be found as far south as Mexico and cover portions of the lower western United States. Mating and feeding activity keeps the Giant Darner busy throughout the spring and summer months. Adults eat insects (crawling and flying), helping control the population size of nuisance bugs like mosquitoes and flies. Like most other dragonflies, the Giant Darner lays its eggs in water sources, allowing larvae to burrow into the water source's bottom. These develop into naiads and feed on other aquatic insects as well as small fish and tadpoles. They eventually crawl out of the water to molt, where they finish developing, add wings and mature into adults.




Taxonomic Hierarchy
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Odonata
        Family: Aeshnidae
          Genus: Anax
            Species: walsinghami
Identifying Information
Scientific Name: Anax walsinghami
Other Name(s): Darner
Category: Dragonfly or Damselfly
Size (Adult; Length): 90mm to 127mm (3.51in to 4.95in)
Colorwheel Graphic Colors: green, tan, black, blue
Descriptors: flying, helpful
Territorial Map
Alaska  
Hawaii  
Prince Edward Is.  
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Territorial Reach (A-to-Z)
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delware
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
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
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.