The Australian Emperor is a very large dragonfly, up to 70 mm long.

The Australian Emperor is widespread and common on larger bodies of water with tall vegetation on the banks.

The Australian Emperor is found throughout Australia.

Australian emperor, Lethrinus punctulatus .

Hemianax papuensis, The Australian Emperor or Yellow Emperor , is a dragonfly of the family Aeshnidae.

Hemianax papuensis (also known as the Australian Emperor Dragonfly and Yellow Emperor Dragonfly) is a species of dragonfly in the Aeshnidae family that can be found in Australia.

Motion camouflage has also been observed in territorial battles between dragonflies, where males of the Australian Emperor Dragonfly, Hemianax papuensis, were seen to adjust their flight paths to appear stationary to their rivals in "breakneck territorial dogfight[s]".

The Australian Emperor is notable as the dragonfly in which Motion camouflage was studied by Mizutani et al.: males of H. papuensis are fiercely territorial, and to approach and attack rivals, the males choose a flight path that keeps their image as seen by the target still with respect to a landmark point.

Hemianax papuensis (also known as the Australian Emperor Dragonfly and Yellow Emperor Dragonfly) is a species of dragonfly in the Aeshnidae family that can be found in Australia.

Motion camouflage has also been observed in territorial battles between dragonflies, where males of the Australian Emperor Dragonfly, Hemianax papuensis, were seen to adjust their flight paths to appear stationary to their rivals in "breakneck territorial dogfight[s]".