About 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.
How to Identify Common Alderfly
Common Alderfly (Sialis lutaria) belongs to the order Megaloptera, family Sialidae. Adults typically measure 12-16 mm.
Common Alderfly Habitat
Common Alderfly is found in ponds & lakes habitats, particularly across Europe, Asia. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Common Alderfly Diet and Feeding
Common Alderfly is a predatory species that actively hunts and feeds on other insects and small invertebrates. As a predator, it helps control populations of pest species and maintains ecological balance.
Where Is Common Alderfly Found?
Common Alderfly can be found in Europe, Asia, where it inhabits ponds & lakes environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Common Alderfly can be found
Is Common Alderfly Dangerous?
Common Alderfly is generally harmless to humans. It does not bite or sting and poses no significant health risk. Like most insects, it prefers to avoid human contact and will typically flee rather than confront a perceived threat.
Common Alderfly Role in Nature
Common Alderfly serves as a natural predator, helping to control populations of other insects. Predatory insects are valuable in both natural ecosystems and agriculture, where they reduce the numbers of pest species without the need for chemical pesticides.
Seasonal Activity
Frequently Asked Questions About Common Alderfly
What does Common Alderfly look like?
The Common Alderfly typically measures 12-16 mm.
Where is Common Alderfly found?
The Common Alderfly is found in Europe, Asia and typically inhabits ponds & lakes environments.
What does Common Alderfly eat?
The Common Alderfly is a predator that hunts and feeds on other insects and small invertebrates.
Is Common Alderfly dangerous to humans?
The Common Alderfly is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Common Alderfly?
Alderfly females lay hundreds of eggs in neat rows on vegetation overhanging water, and the larvae drop into the water upon hatching.
Cite This Page
APA:
InsectDiscover. (2026). Common Alderfly (Sialis lutaria). Retrieved from https://insectdiscover.com/insect/common-alderfly
MLA:
"Common Alderfly." InsectDiscover, https://insectdiscover.com/insect/common-alderfly.