Long-horned glass-wing caddisfly
Leptocerus tineiformis
The long-horned glass-wing caddisfly is a member of the Leptoceridae family, primarily found in stagnant or slow-moving waters across Central Europe. It is characterized by its exceptionally long, thread-like antennae, which in males can reach three times the body length. The wings are narrow, hyaline (glassy), and often feature fine, light-colored hairs. The larvae are aquatic and construct portable cases made from fine sand grains or plant fragments.
Details
Identification
Extremely long antennae (up to 3 times body length), hyaline (glassy) forewings, very slender body build, often resting on riparian vegetation with antennae stretched forward.
Social behavior
Adults often form small swarms over the water surface at dusk for mating purposes.
Diet
The larvae are omnivores, feeding on algae, detritus, and occasionally small invertebrates.
Hunting strategy
Passive gathering and grazing of organic material and periphyton on substrates.
Spawning substrate
Submerged aquatic plants or stones where eggs are deposited in a gelatinous mass.
Overwintering
The species overwinters as a larva in the benthos or on aquatic plants.
Ecology
Ecological role
Important primary consumer and decomposer in the aquatic ecosystem; serves as a significant food source for fish and birds.
Natural predators
Fish (e.g., trout, perch), dragonfly larvae, predatory water bugs, birds (sand martins).
Competitor species
Other caddisfly species of the Leptoceridae family, such as Mystacides species.
Ecosystem service
Contribution to the nutrient cycle through decomposition of organic matter; link in the food chain.
Threats
Water pollution, eutrophication, destruction of riparian vegetation, and structural modification of lentic waters.
Scientific profile
Profile
Distinguishing features
Extremely long, filiform antennae (especially in males), exceeding body length several times. Forewings narrow and elongated.