Sweat Fly vs Sand Robber Fly

Side-by-side species comparison

Attribute Sweat Fly Sand Robber Fly
Scientific Name Hydrotaea irritans Philonicus albiceps
Order Diptera Diptera
Family Muscidae Asilidae
Size 5-7 mm 12-18 mm
Habitat Farmland Beaches & Coastal
Diet Dung Feeders Predators
Regions Europe, North America Europe, North Africa
Conservation Least Concern Least Concern

Sweat Fly

A small dark fly attracted to perspiration on humans and livestock. It forms dense head-circling swarms in summer that can be extremely annoying.

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Did You Know?

Swarms of these flies can reduce cattle weight gain by causing constant head-tossing behavior.

Sand Robber Fly

A pale sandy-colored robber fly found on coastal dunes and sandy heaths. It hunts other flies and small insects on open sand.

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Did You Know?

Its pale coloration provides perfect camouflage against the sandy substrates where it hunts.