The Blue Damselfly (Austrolestes colensoni), or kekewai (Māori), is New Zealand's largest damselfly. It flies between the months of October and May, usually seen over still water such as ponds and lakes, where there are generally rushes and reeds. This common damselfly is a native and common in New Zealand.

Damselflies are similar but smaller than dragonflies and they hold their wings folded up, rather than open, when stationary. To regulate their body temperature they can change their colour, going darker to receive more warmth. Apparently 80% of their brain power is devoted to processing visual images. The adults catch & eat other flying insects, and chase other damselflies from their territory. Only the male is blue, the female is greener.