Rhytidoponera metallicaCommon name: Green Headed Ant
Distribution: This species has been found across most of Australia.
Remarks: Green headed ants appear black unless viewed closely.
They have a painful, but short-lived, sting. However, some individual can be sensitive to the sting and require hospital treatment.
These ants were approximately 7 millimetres long.
References: Wikipedia https://en.wikipedia.org/wiki/Green-head_ant
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