Sand Gnat vs Common Thick-headed Fly

Side-by-side species comparison

Attribute Sand Gnat Common Thick-headed Fly
Scientific Name Culicoides furens Sicus ferrugineus
Order Diptera Diptera
Family Ceratopogonidae Conopidae
Size 1-2.5 mm 8-12 mm
Habitat Wetlands Underground
Diet Blood Feeders Nectar Feeders
Regions Coastal Americas from the southeastern United States to Brazil Europe
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.

Common Thick-headed Fly

A distinctive orange-brown fly with a disproportionately large, inflated head and a curved abdomen. It perches conspicuously on flowers waiting to intercept passing bumblebees.

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Did You Know?

The parasitized bumblebee eventually dies and buries itself in the ground, where the fly larva pupates inside the bee.