Thread-winged Antlions

Nemopteridae, the spoonwings, are a family of neuropteran insects. They are also called thread-winged antlions. They are found in the Ethiopian, Palearctic, Australasian and Neotropical realms but absent in North America (though a fossil has been found in Colorado).

Their flight is delicate and they have a circling flight to avoid walls when they are trapped indoors. The long streamer is conspicuous when the insects are flying and these are the elongated and spatulate hindwings.