Sand Gnat vs Warble Fly

Side-by-side species comparison

Attribute Sand Gnat Warble Fly
Scientific Name Culicoides furens Hypoderma bovis
Order Diptera Diptera
Family Ceratopogonidae Oestridae
Size 1-2.5 mm 13-15 mm
Habitat Wetlands Farmland
Diet Blood Feeders Predators
Regions Coastal Americas from the southeastern United States to Brazil Europe, Asia, North America
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.

Warble Fly

A large, hairy bee-like fly whose larvae migrate through the bodies of cattle for months before emerging from cysts in the back. Adults have vestigial mouthparts and cannot feed.

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Did You Know?

The buzzing of a single warble fly approaching can cause an entire herd of cattle to stampede in panic, a behavior called gadding.