Hessian Fly vs Australian March Fly

Side-by-side species comparison

Attribute Hessian Fly Australian March Fly
Scientific Name Mayetiola destructor Bibio imitator
Order Diptera Diptera
Family Cecidomyiidae Bibionidae
Size 2-4 mm 6-10 mm
Habitat Farmland Woodlands
Diet Gall Makers Herbivores
Regions Cosmopolitan - originally Eurasia, now worldwide Australia
Conservation Least Concern Least Concern

Hessian Fly

A tiny dark gall midge that is one of the most destructive pests of wheat and barley worldwide. Adults resemble small dark mosquitoes and live for only a few days.

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Did You Know?

Named after Hessian soldiers in the American Revolution who supposedly brought it to North America in straw bedding.

Australian March Fly

A robust black bibionid fly that appears in large numbers during the Australian autumn. It has a hairy body and is a sluggish flyer, often seen resting on vegetation.

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Did You Know?

Despite sharing the common name with horse flies in Australia, march flies in the family Bibionidae are completely harmless.