👉 A purfly is a type of butterfly that has a long, narrow bill and can be found in many parts of the world. They are also known as "spider flies" due to their appearance resembling spiders. The name "purfly" comes from the fact that they have a purplish coloration on their wings, which is often associated with water. It's important to note that not all purflies are related to spiders and some species can be found in aquatic environments.