Hemicordulia australiae
In 3 days ~10% in a week ~30%
The Australian emerald (Hemicordulia australiae) is a species of dragonfly in the family Corduliidae. It can be found in Australia, Lord Howe Island, Norfolk Island, Lesser Sunda Islands and New Zealand. It is a small to medium-sized, long-legged dragonfly coloured black-metallic and yellow.
In both males and females the inboard edge of the hindwing is rounded. The Australian emerald appears similar to the tau emerald (Hemicordulia tau). The genus name Hemicordulia is derived from the Greek ἡμι- (hēmi, "half"), combined with Cordulia, a genus name derived from the Greek κορδύλη (kordylē, "club" or "cudgel"). The name refers to the close relationship of the genus to Cordulia.
The species name australiae is Latin for "of Australia", referring to the origin of the original specimens. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Lamington National Park | 🇦🇺 Australia | |
| 2 | Springbrook National Park | 🇦🇺 Australia | |
| 3 | Royal National Park | 🇦🇺 Australia | |
| 4 | Grampians National Park | 🇦🇺 Australia | |
| 5 | Blue Mountains National Park | 🇦🇺 Australia | |
| 6 | Great Otway National Park | 🇦🇺 Australia |
Rare
Under 5% of wildlife watchers report an Australian Emerald Dragonfly sighting in Perth on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 154th most-seen of the 275 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
October and December–January
In those months about 10% of wildlife watchers report an Australian Emerald Dragonfly in Perth on a given day, against under 5% in February–September and November, the lowest months. Those are among Perth's driest months, with about 20 mm of rain a month against 130 mm in July.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Australian Emerald Dragonfly sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 4
Of the 4 cities where we can rate Australian Emerald Dragonfly sightings, Perth ranks 4th at under 5%. The best odds are in Brisbane (Australia, about 20%), Sydney (Australia, about 10%) and Melbourne (Australia, about 10%).
GBIF citizen-science records
It is estimated from how often the Australian Emerald Dragonfly is recorded against all the insects logged in Perth (11 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
