Japanese Beetle Tachinid vs Bee Killer Robber Fly

Side-by-side species comparison

Attribute Japanese Beetle Tachinid Bee Killer Robber Fly
Scientific Name Istocheta aldrichi Mallophora bomboides
Order Diptera Diptera
Family Tachinidae Asilidae
Size 5-7 mm 20-28 mm
Habitat Orchards Farmland
Diet Parasites Herbivores
Regions North America, Asia Eastern United States from New England to Florida
Conservation Least Concern Least Concern

Japanese Beetle Tachinid

A parasitic fly introduced from Japan to North America specifically for Japanese beetle control. Females lay eggs on the beetle's thorax.

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Did You Know?

White eggs visible on a Japanese beetle's thorax are a telltale sign of parasitism by this fly.

Bee Killer Robber Fly

A large fuzzy robber fly that closely resembles a bumble bee in both appearance and buzzing flight. It perches on vegetation and launches aerial attacks on passing insects.

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Did You Know?

Its bumble bee mimicry is so convincing that it can sit among real bees at flowers without being recognized as a predator.