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HEMICORDULIIDAE  - Emerald Dragonflies

The family Hemicorduliidae is newly separated from the family Corduliidae.  
 
Newly emerged Emerald 
 
Members in this family are medium to large size, which generally have metallic green, black or yellow body. They have emerald eyes when matured, but often brown in immature stage. When perched, they hang suspended vertically.
 
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Larval exuviaes length 25mm                                
 
Emerald Dragonflies are strong flyer and spend most of the time flying in air during a sunny day. 

Australian Emerald
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Hemicordulia australiae, female, male, body length 50mm
The Australian Emerald Dragonflies are strong flyer and spend most of the time flying in air. They are long and slender, with black pattern on yellow colour. The black patterns are shiny blue green under the sun. Their eyes and mouth occupy almost all their head with bright green in colour. More information please click here.
 
 
Fat-bellied Emerald, Clubbed Emerald, Broad-tailed Emerald
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Hemicordulia continentalis, female, male, body length 40mm, 
The Clubbed Emerald Dragonflies are medium in size, body length about 40mm. When we took those pictures, we through they were Australian Emerald, another Emerald dragonfly species which is common in Brisbane. Fat-bellied Emeralds can be distinguished from other Emerald dragonfly species by the male's strongly club-shaped abdomen. More information and pictures please click here.
 
 
Tau, Emerald, T-mark Emerald
 
Hemicordulia tau, body length 50mm
The dragonfly's body is yellow in colour with black pattern. They look very similar to another Emerald species Australian Emerald. They can usually be found in the same place. Because both of them never rest, it is difficult to distinguish between them. The second picture shows the close look of the dragonfly's face. Notice that when look at its face from its front, the is the inverse black 'T' mark on its 'nose'. This is why they are call T-Mark Emerald. More information please click here.
 

Reference:
1. The Australian Dragonflies - CSIRO, Watson, Theisinger & Abbey,1991, p215.
2. A Field Guide to Dragonflies of South East Queensland - Ric Nattrass, 2006, p73.
3. The Complete Field Guide to Dragonflies of Australia - CSIRO, GŁnther Theischinger and John Hawking, 2006, p244.
4. HEMICORDULIIDAE - Australian Biological Resources Study, Department of the Environment and Water Resources, 2007. 

 
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Up ] Damselfly Field Guide ] Dragonfly Field Guide ] PETALURIDAE ] TELEPHEBIIDAE ] AESHNIDAE ] LINDENIIDAE ] GOMPHIDAE ] SYNTHEMISTIDAE ] [ HEMICORDULIIDAE ] LIBELLULIDAE ] More About Dragonfly ]

                                                

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Last updated: February 18, 2008.