Sand Gnat vs Scarlet Robber Fly

Side-by-side species comparison

Attribute Sand Gnat Scarlet Robber Fly
Scientific Name Culicoides furens Laphria flava
Order Diptera Diptera
Family Ceratopogonidae Asilidae
Size 1-2.5 mm 15-25 mm
Habitat Wetlands Woodlands
Diet Blood Feeders Predators
Regions Coastal Americas from the southeastern United States to Brazil Europe, Northern Asia
Conservation Least Concern Least Concern

Sand Gnat

A very small biting midge commonly known as a no-see-um due to its near-invisible size. Despite being barely visible, its bite is intensely painful and causes persistent itching.

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Did You Know?

It is so small it can pass through standard window screens, earning the nickname no-see-um.

Scarlet Robber Fly

A bumblebee-mimicking robber fly covered in dense golden-yellow hair. It preys on insects visiting flowers at woodland edges.

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Did You Know?

Its dense yellow pile makes it one of the most convincing bumblebee mimics among robber flies.