Hemicordulia tau
1 Tau Emerald at Evatt, ACT
Identify this sighting
| Hemicordulia tau | roymcd | 11 Apr 2020 | |
| Hemicordulia tau | roymcd | 11 Apr 2020 | |
| Unverified | TimL | 10 Apr 2020 |
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User's notes
The dragonfly was sighted resting after a recent cold night. The fourth and fifth images show what I understand to be part of the dragonfly’s respiratory system, an anterior thoracic spiracle valve behind the dragonfly’s head. It was beating open and closed every two seconds, serving the head and the wing muscles. The valve is the circular yellow object with a fold across it, located behind the head and in the centre of each image. Toggling between the two images shows the valve beat closed/open. It is closed in the fourth image and open in the fifth image.
2 comments
Location information
- Coordinates 149.063992-35.213357
- Altitude 598.4m
- Places Evatt, ACT
Sighting information
- 1 Abundance
- 6 Apr 2020 09:58 AM Recorded on
- TimL Recorded by
- 50mm or larger Animal size
Collections
- TimL Canberra & Southern Tablelands NatureMapr Hemicordulia tau Dragonflies (Anisoptera) Dragonflies & Damselflies (Odonata) Insects
Species information
- Hemicordulia tau Scientific name
- Tau Emerald Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- Up to 1635.4m Recorded at altitude
- External link More information
Record quality
Quality score
5 / 7
- Images or audio
- More than one media file
- Verified by an expert moderator
- Description
- Additional attributes
- Nearby sighting(s) of same species
- GPS evidence of location