Damselflies: Austroagrion watsoni

Damselflies Austroagrion cyane Austroagrion watsoni Austroargiolestes calcaris Austrocnemis splendida Austrolestes annulosus Austrolestes aridus Austrolestes cingulatus Austrolestes io Austrolestes leda Austrolestes psyche Coenagrion lyelli Hemiphlebia mirabilis Ischnura aurora Ischnura heterosticta Pseudagrion microcephalum Xanthagrion erythroneurum Dragonflies Anax papuensis Archaeosynthemis orientalis Austroaeschna ingrid Austroaeschna multipunctata Austroaeschna unicornis Austrogomphus guerini Austropetalia tonyana Austrothemis nigrescens Crocothemis nigrifrons Dendroaeschna conspersa Diplacodes bipunctata Diplacodes haematodes Diplacodes melanopsis Diplacodes trivialis Eusynthemis virgula Hemicordulia australiae Hemicordulia tau Notoaeschna sagittata Orthetrum caledonicum Parasynthemis regina Petalura gigantea Procordulia jacksoniensis Synthemis eustalacta Telephlebia brevicauda
distribution map
Source: ALA

♂ Colquhoun, VIC

♀ Colquhoun, VIC

♀ Colquhoun, VIC

♂ (teneral) Nunnock Swamp, NSW
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Common NameSouth-western Billabongfly
FamilyCoenagrionidae
Genus/SpeciesAustroagrion watsoni Lieftinck, 1982
(previously included with Austroagrion cyane).
Abundance &
Distribution
Common from the South Australian-Victorian border through to northern Queensland and the Northern Territory and Kimberley region of Western Australia.
HabitatThese inhabit a wide range of still water, including swamps, and can also be found by sluggish water of rivers and streams. Found at most altitudes.
DescriptionThese are small damselflies featuring an evenly thick pale bar across the back of the head behind the eyes and the dorsal section of abdominal segment 2 is all black. Mature males have black and bright blue markings. Abdominal segment 8 of males is variable and may contain a dark section or be completely pale. All abdominal segments of the female are predominantly black on top. Pale areas of the females are usually grey or tan, possibly with a bluish tinge.
Similar SpeciesAustroagrion cyane are similar (also having a pale line across the back of the head) but male A. cyane has half an extra blue segment near the end of the abdomen (segment 7). Females of these two species are very difficult to tell apart and require details of the facial markings.
Ischnura heterosticta can appear similar but they have two distinct dots behind the eyes.
Pseudagrion microcephalum are generally similar but have more triangular shaped different markings behind the eyes.
Aciagrion fragile appear very similar but are a little bit longer and more slender in appearance.
Behaviour &
Observations
These perch horizontally close to the water surface on emergent aquatic vegetation where they wiat for passing prey or, if male, for females.
LinksBrisbane Insects
Insects of Tasmania
Wikipedia

Page Updated: 18-Jan-2016
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