About Eristalis rupium Fabricius, 1805
Eristalis rupium, commonly known as the spot-winged drone fly, is a species of syrphid fly first officially described by Fabricius in 1805. This species is common in Europe, and uncommon in North America. Hoverflies, the common name for this group of insects, get their name from their ability to stay nearly motionless while in flight. Adult hoverflies are also called flower flies, because they are regularly found around and on flowers, where they collect energy-giving nectar and protein-rich pollen. The larvae of Eristalis rupium are aquatic rat-tailed filter-feeders, which live in clear-water streams.
