Bug Identifier
Bumble Bee Robber Fly
Community identification

Bumble Bee Robber Fly

Laphria thoracica

Order & Family
Diptera (True Flies), Asilidae (Robber Flies)
Size
15 to 28 mm (0.6 to 1.1 inches)
See this bug in the Encyclopedia

Natural Habitat

Woodlands, forest edges, clearings, and gardens where prey and perches are abundant.

Diet & Feeding

Carnivorous. As an ambush predator, it hunts insects such as bees, wasps, beetles, and other flies by capturing them mid-air and injecting paralyzing venom and digestive enzymes.

Behavior Patterns

Mimics bumble bees in color, size, and fuzzy appearance as a defense mechanism against predators (Batesian mimicry). They often perch on leaves or tree trunks to spot passing prey before launching high-speed aerial attacks.

Risks & Benefits

Harmless to humans unless aggressively handled, in which case they can deliver a painful bite. Beneficial to ecosystems as natural biological control agents that keep various insect populations in check.