Hemicordulia tau

Tau Emerald at Googong, NSW

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Unverified WHall 13 Dec 2020
Hemicordulia tau HarveyPerkins 13 Dec 2020
Hemicordulia australiae WHall 13 Dec 2020

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3 comments

   13 Dec 2020
Hi Harvey, why H. tau and not H. australiae?

Bill
   13 Dec 2020
Four key corroborating features: 1. the lack of dorsal extension of the yellow patches on abdominal segments 7 and 8; 2. the inverted black "T" mark on the frons (there would be a metallic black patch on the upper frons for an Australian Emerald); 3. the brown upper part of the eyes (rather than blueish/greeninsh); and 4. the yellow pterostigma in this young individual (darker in australiae). Your photos are excellent for showing all of these features.
   13 Dec 2020
Thank you for this explanation and your kind comments re the images.

Bill

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Location information

Sighting information

  • 1 Abundance
  • 12 Dec 2020 11:07 AM Recorded on
  • WHall Recorded by
  • Grevillea sp Associated plant
  • 25mm to 50mm Animal size

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Record quality

Quality score 5 / 7
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