Hemerobius lutaria Linnaeus, 1758, Europe.
French: Mouche du Saule; German: Gemeine Wasserflorfliege; Danish: Dovenflue.
Adults are 0.52-0.72 in (13-18 mm) in size and blackishbrown in colour.
Occurs in Europe and into Russia.
Larvae inhabit the depths of nonetheless waters and muddy backwaters of rivers.
During spring and early summer time adults are discovered on vegetation close to the water; they fly solely when it's sunny and heat.
FEEDING ECOLOGY AND DIET
Larvae feed on worms, insect larvae, and different small freshwater animals. Adults often take nectar from flowers with simply accessible nectaries.
After mating, the feminine deposits darkish grey eggs on leaves of littoral vegetation after which cleans the newly laid eggs. Larvae crawl into the water and scurry to the underside, the place they tunnel within the silt. After two winters the larva leaves the water and pupates for 2 weeks. The best numbers of adults are seen on the wing from May by means of mid-June.
SIGNIFICANCE TO HUMANS
They are bioindicators in water high quality evaluation.