Bug Identifier
Robber Fly
Community identification

Robber Fly

Asilidae (family)

Order & Family
Order: Diptera, Family: Asilidae
Size
Typically range from 8 mm to 60 mm (approximately 0.3 to 2.4 inches) in length, depending on the species.
See this bug in the Encyclopedia

Natural Habitat

Found in diverse habitats ranging from forests, woodlands, and grasslands to deserts and urban gardens. They prefer open areas where they can spot prey, such as fields, meadows, and along the edges of paths and clearings.

Diet & Feeding

Strictly carnivorous; they prey on a wide variety of other insects, including bees, wasps, beetles, butterflies, grasshoppers, and even other flies. They inject their prey with neurotoxic and proteolytic enzymes to paralyze and digest the internal contents, then suck out the liquefied tissues.

Behavior Patterns

Robber flies are ambush predators, often perching in open, sunny locations waiting for prey to fly by. They are fast and agile in flight. Mating involves complex aerial dances, and eggs are typically laid in soil or on vegetation.

Risks & Benefits

Potential risks: They can deliver a painful bite if handled, though they are not aggressive towards humans. The bite is equivalent to a bee sting. Benefits: They are beneficial insects in most ecosystems, helping to control populations of other insects, including some agricultural pests. They do not transmit diseases.