About Large Alderfly
A relatively large alderfly with dark wings and black legs found near rivers in eastern North America. Adults rest on streamside vegetation during the day.
Did You Know?
Alderfly larvae breathe through feathery gills along their abdomen and a single long tail filament that acts as an additional gill.
How to Identify Large Alderfly
Large Alderfly (Sialis nigripes) belongs to the order Megaloptera, family Sialidae. Adults typically measure 15-20 mm.
Large Alderfly Habitat
Large Alderfly is found in rivers & streams habitats, particularly across North America. This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Large Alderfly Diet and Feeding
Large Alderfly is a herbivore, feeding on plant material including leaves, stems, flowers, and other vegetation. Herbivorous insects play a significant role in ecosystems by influencing plant growth and serving as a food source for predators.
Where Is Large Alderfly Found?
Large Alderfly can be found in North America, where it inhabits rivers & streams environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Large Alderfly can be found
Is Large Alderfly Dangerous?
Large 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.
Large Alderfly Role in Nature
Large Alderfly is part of the food web as a primary consumer, feeding on plant material. It serves as an important food source for birds, bats, amphibians, and other insectivores, connecting plant energy to higher trophic levels.
Seasonal Activity
Frequently Asked Questions About Large Alderfly
What does Large Alderfly look like?
The Large Alderfly typically measures 15-20 mm.
Where is Large Alderfly found?
The Large Alderfly is found in North America and typically inhabits rivers & streams environments.
What does Large Alderfly eat?
The Large Alderfly feeds on plant material including leaves, stems, and other vegetation.
Is Large Alderfly dangerous to humans?
The Large Alderfly is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Large Alderfly?
Alderfly larvae breathe through feathery gills along their abdomen and a single long tail filament that acts as an additional gill.
Cite This Page
APA:
InsectDiscover. (2026). Large Alderfly (Sialis nigripes). Retrieved from https://insectdiscover.com/insect/large-alderfly
MLA:
"Large Alderfly." InsectDiscover, https://insectdiscover.com/insect/large-alderfly.