Bug Identifier
Robber Fly
Community identification

Robber Fly

Asilidae (family)

Order & Family
Diptera: Asilidae
Size
3 mm to 50 mm (average 1 cm to 1.5 cm for most common garden species)
See this bug in the Encyclopedia

Natural Habitat

Open areas with plenty of sunlight such as grasslands, meadows, forest edges, and gardens where prey is abundant.

Diet & Feeding

Aggressive predators; they eat other insects including bees, wasps, flies, dragonflies, and grasshoppers by catching them in mid-air.

Behavior Patterns

Known for their aerial agility, they perch in sunny spots to ambush passing prey. They inject saliva containing neurotoxic and proteolytic enzymes to paralyze victims.

Risks & Benefits

Highly beneficial to the ecosystem as natural pest controllers; they can deliver a painful bite to humans if handled, but they are not aggressive toward people.