The Protoneuridae are a family of damselflies. Most species are commonly known as threadtails, while others are commonly known as bambootails. They are called threadtails because their abdomen are thin and threadlike.
Threadtails are usually small-sized damselflies and their wings are narrow and mostly transparent, with simple venation. The males tend to be colourful and many have a red, orange, yellow or blue thorax and a black abdomen. Others have a black thorax and brightly-coloured abdomen and others are entirely dark. Their usual habitats are the verges of rivers and streams and the margins of large lakes.