The Dark-edged Bee Fly, or Large Bee-fly, is the commonest of four species species of Bee-fly found in the UK. They appear a bit like bumble bees with their furry bodies, but have a long proboscis used for drinking nectar from flowers. The Dark-edged Bee Fly is identified by the dark leading edges to it’s wings, most clearly seen when the insect is at rest.
Bee-flys are parasitic on solitary bees. Females will hover above the next holes of solitary bees and flick eggs into the hole. To facilitate this, the females will first collect dust and fine soil with which they coat the eggs prior to flicking into the bee’s nest holes.
Dark-edged Bee Flies are typically seen on the wing in March through to May or June, and are particularly active on warmer, sunny days.