racket-tailed emerald

(Dorocordulia libera)

Conservation Status
racket-tailed emerald
  IUCN Red List

not listed

     
  NatureServe

N5 - Secure

SNR - Unranked

     
  Minnesota

not listed

     
           
           
 
Description
 
 

Racket-tailed emerald is a fairly common, small, slender, 1 to 1 long emerald.

The thorax is dark brown and metallic green with no vertical stripes on the sides. It is densely covered with brown hairs.

The abdomen is long, slender, and black. There are no spots on the upper (dorsal) surface. The base of the abdominal segment 3 has a yellow ring around it that is uneven in width, wider at the base, forming a lower lateral basal spot. On the male, abdominal segments 7 through 9 are greatly expanded and somewhat flattened horizontally, forming a flat club. On the female, segments 7 through 9 are only slightly expanded.

The wings are long, slender, and clear except for a black stigma at the leading edge of each wing and sometimes a small amber-tinted patch near the base. The forewing triangle does not have a cross vein.

The eyes are bright green and are in contact at the top of the head. The face is metallic green.

The legs are black.

 
     
 

Size

 
 

1 to 1 long

 
     
 

Similar Species

 
  American emerald (Cordulia shurtleffii) is larger, up to 1 long. The ring around the base of abdominal segment 3 is narrow and even in width. The forewing triangle has a cross vein.  
     
 
Habitat
 
 

Small lakes, ponds, lake coves, and slow streams with boggy edges.

 
     
 
Biology
 
 

Season

 
 

Early June to mid-August

 
     
 

Behavior

 
 

 

 
     
 

Life Cycle

 
 

 

 
     
 

Naiad Food

 
 

 

 
     
 

Adult Food

 
 

 

 
     
 
Distribution
 
 

Distribution Map

 

Sources

7, 17, 18.

 
  10/19/2012      
         
 

Occurrence

 
 

Fairly common

 
         
 
Taxonomy
 
 

Order

Odonata (dragonflies and damselflies)  
 

Suborder

Epiprocta  
  Infraorder Anisoptera (dragonflies)  
 

Superfamily

Cavilabiata  
 

Family

Corduliidae (emeralds)  
 

Subfamily

Corduliinae  
  Genus Dorocordulia  
 

 

 
       
 

Synonyms

 
 

 

 
       
 

Common Names

 
 

racket-tailed emerald

 
       

 

 

 

 

 

Glossary

Stigma

In plants, the portion of the female part of the flower that is receptive to pollen. In Odonata and Hymenoptera, a blood-filled blister or dark spot at the leading edge of each wing toward the tip, thought to dampen wing vibrations and signal mates. In Lepidoptera, an area of specialized scent scales on the forewing of some skippers, hairstreaks, and moths.

 

 

 

 

 

 
 
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MinnesotaSeasons.com Photos
 
    racket-tailed emerald   racket-tailed emerald  
           
    racket-tailed emerald   racket-tailed emerald  
           

 

Camera

     
 
Slideshows
 
Dorocordulia libera (Racket-tailed Emerald)
Allen Chartier
  Dorocordulia libera (Racket-tailed Emerald)  
     

 

slideshow

       
 
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Other Videos
 
  Racket-tailed Emerald Dragonfly (Corduliidae: Dorocordulia libera) on Grass Blade
Carl Barrentine
 
   
 
About

Uploaded on Jul 2, 2011

Photographed at the Rydell NWR, Minnesota (29 June 2011).

 
       

 

Camcorder

 
 
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