Screwworm Fly vs Slender Robber Fly

Side-by-side species comparison

Attribute Screwworm Fly Slender Robber Fly
Scientific Name Cochliomyia hominivorax Leptogaster cylindrica
Order Diptera Diptera
Family Calliphoridae Asilidae
Size 8-12 mm 8-12 mm
Habitat Forests Meadows
Diet Blood Feeders Predators
Regions Central America, South America, Caribbean Europe, Western Asia
Conservation Least Concern Least Concern

Screwworm Fly

A devastating parasitic fly whose larvae feed on living tissue of warm-blooded animals. It was eradicated from North America using the sterile insect technique.

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Did You Know?

The sterile male release program that eradicated it from the US is considered one of the greatest triumphs in pest control history.

Slender Robber Fly

A delicate, narrow-bodied robber fly with an extremely slender abdomen. It hunts small insects among tall grass stems.

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Did You Know?

Its thread-like abdomen makes it almost invisible when resting on grass stems.