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).

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