The blue ringtail (Austrolestes annulosus) is an Australian damselfly.

The blue ringtail was first described by Edmond de Sélys Longchamps in 1862.

[4] It can easily be confused with Coenagrion lyelli or Caliagrion billinghursti, but can be differentiated through dorsal patterns.

They are a thin, medium-sized damselfly with varying coloration, which depends on maturity and temperature.

Females are slightly more robust than males, and have a black and white/pale blue coloration.