Common Alderfly vs Smoky Alderfly
Side-by-side species comparison
| Attribute | Common Alderfly | Smoky Alderfly |
|---|---|---|
| Scientific Name | Sialis lutaria | Sialis fuliginosa |
| Order | Megaloptera | Megaloptera |
| Family | Sialidae | Sialidae |
| Size | 12-16 mm | 12-16 mm |
| Habitat | Ponds & Lakes | Ponds & Lakes |
| Diet | Predators | Omnivores |
| Regions | Europe, Asia | Europe |
| Conservation | Least Concern | Least Concern |
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.
Smoky Alderfly
A European alderfly distinguished from S. lutaria by its preference for flowing water rather than still ponds. It has dark smoky wings and a blackish body.
Did You Know?
This alderfly is a reliable indicator of clean running water and is one of the first species to disappear when streams become polluted.