Common Soldier Fly (larva)
Stratiomys chamaeleon
The Common Soldier Fly (Stratiomys chamaeleon) is known for its aquatic larvae, colloquially called 'Pinseltaler' due to their flattened shape and the circular respiratory crown at the posterior end. The larvae inhabit shallow, stagnant waters and use the hairy crown to take in atmospheric oxygen at the water surface. The adults feature a striking yellow-black pattern and are significant pollinators in wetland ecosystems.
Details
Identification
Larva: Segmented, flattened body, calcified skin, feathery respiratory crown at the posterior end. Adult: Black with yellow spots on the abdomen.
Social behavior
The larvae often live gregariously in high densities in the mud, while the adults are solitary flower visitors.
Diet
Larvae feed on algae, microorganisms, and detritus; adults feed on nectar and pollen.
Hunting strategy
The larvae are substrate feeders and filter organic particles from the mud.
Spawning substrate
Underside of aquatic plants or riparian vegetation directly above the water surface.
Overwintering
Overwintering in the larval stage within the aquatic substrate or moist shore areas.
Ecology
Ecological role
Larvae are important decomposers in aquatic systems; adults function as pollinators for marsh and aquatic plants.
Natural predators
Waterfowl, fish, predatory aquatic insects (e.g., dragonfly larvae), and spiders.
Competitor species
Other detritivorous insect larvae such as non-biting midges (Chironomidae).
Ecosystem service
Nutrient recycling in small water bodies and pollination of wild plants.
Threats
Loss of wetlands, drainage of small ponds, and intensive agricultural use (eutrophication).
Scientific profile
Profile
Distinguishing features
The scutellum is almost entirely yellow (distinction from S. singularior). Antennae are long, with the first segment at least three times as long as the second. The yellow abdominal spots are large and often nearly meet in the center.