Western Fishfly vs Common Alderfly
Side-by-side species comparison
| Attribute | Western Fishfly | Common Alderfly |
|---|---|---|
| Scientific Name | Neohermes filicornis | Sialis lutaria |
| Order | Megaloptera | Megaloptera |
| Family | Corydalidae | Sialidae |
| Size | 40-55 mm wingspan | 12-16 mm |
| Habitat | Rivers & Streams | Ponds & Lakes |
| Diet | Predators | Predators |
| Regions | Western North America | Europe, Asia |
| Conservation | Least Concern | Least Concern |
Western Fishfly
A western North American fishfly with feathery antennae and brownish wings. Adults are attracted to lights near streams where their larvae develop.
Did You Know?
Fishflies are distinguished from dobsonflies by their feathery antennae and lack of massive mandibles in males.
Common Alderfly
A dark smoky-winged insect commonly found near still or slow-moving waters across Europe. Its aquatic larvae are predators in lake and pond sediments.
Did You Know?
Alderfly females lay hundreds of eggs in neat rows on vegetation overhanging water, and the larvae drop into the water upon hatching.