Blasenfliegen

Blasenfliegen, scientifically known as Bombyliidae, are a family of flies comprising over 4,700 described species. They are commonly referred to as bee flies due to their often hairy, robust bodies, which can resemble those of bees. Their coloration also frequently mimics that of bees or wasps, offering a degree of protection through Batesian mimicry.

These flies are characterized by their relatively short, stout bodies and a long, slender proboscis, which they use to feed on nectar and pollen from flowers. This proboscis is often extended forward and downward when the fly is at rest. Many species are important pollinators, visiting a wide variety of flowering plants.

The life cycle of Blasenfliegen typically involves a predatory or parasitic larval stage. The eggs are usually laid in or near the burrows of other insects, particularly solitary bees and wasps. Upon hatching, the larvae enter the host's nest and feed on the host's eggs, larvae, or stored food. This parasitic relationship is a key ecological role of this family.

Blasenfliegen are found worldwide, with the highest diversity occurring in arid and semi-arid regions. They are diurnal insects and are most active during warm, sunny weather. Their flight pattern is often described as hovering, similar to that of hummingbirds, as they move between flowers to feed. Despite their sometimes intimidating appearance, adult Blasenfliegen are harmless to humans.