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Eastern Billabongfly - Austroagrion watsoni 

FAMILY COENAGRIONIDAE

This page contains information and pictures about Eastern Billabongflies that we found in the Brisbane area, Queensland, Australia. They are also known as Eastern Dart.
 
Male, body length 25mm
 
Eastern Billabongflies are small damselflies. They can be found near slow running water or still water. They usually rest on the plants either in the middle of ponds or at the water edges. The pictures in this page are mostly taken at Wishart along Bulimba Creek and at the large ponds in Mt Coot-tha Botanic Garden.
 
    
 
The male damselfly is brightly blue  in colour with black pattern on abdomen. It looks similar to the Common Bluetail and Blue Riverdamsel except Eastern Billabongfly is smaller and with a blue bar on top of their eyes instead of two blue dots. There are two black squares on its blue tail while Common Bluetail and Blue Sprite's tails are all blue.
 
DSC_2767.jpg (55601 bytes)
 
The male Eastern Dart Damselfly has its blue thorax with black marks. Its long and slender abdomen is black in colour with blue rings. There is the blue tip at the end of abdomen. The female is the same size and with pale blue to grayish-green in colour.
 
 
Male and female Eastern Dart Damselflies in wheel position. 
 
More information about damselfly reproduction can be found on the Mating Behaviour pages.
 
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We took the above picture in Brisbane Botanic Garden on Oct 2004. The damselfly had just emerged from last moulting. It was pale green in colour, its body was weak and could not fly properly. Its body would be harden and turn into blue colour within hours. Before this, the young damselfly was quite vulnerable. The pale green colour helped it hiding among plants during this dangerous period.
 
Wings of Eastern Billabongfly

Reference:
1. The Australian Dragonflies - CSIRO, Watson, Theisinger & Abbey,1991, p128.
2. A Field Guide to Dragonflies of South East Queensland - Ric Nattrass, 2006, p33.
3. The Complete Field Guide to Dragonflies of Australia - CSIRO, GŁnther Theischinger and John Hawking, 2006, p92.

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Last updated: February 28, 2008.