Ozark Stiletto Fly vs American Horse Fly

Side-by-side species comparison

Attribute Ozark Stiletto Fly American Horse Fly
Scientific Name Thereva frontalis Tabanus americanus
Order Diptera Diptera
Family Therevidae Tabanidae
Size 8-11 mm 20-28 mm
Habitat Woodlands Ponds & Lakes
Diet Predators Blood Feeders
Regions North America Eastern and central United States
Conservation Least Concern Least Concern

Ozark Stiletto Fly

A medium-sized stiletto fly with a grayish body covered in fine pale hairs and clear wings. It is commonly found resting on sunlit surfaces in open woodlands.

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Did You Know?

The larvae have a unique ability to move rapidly through loose sand using undulating body movements.

American Horse Fly

One of the largest horse flies in North America with a dark brown body and conspicuous green or purple iridescent eyes. Females deliver a painful slashing bite to obtain blood meals.

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Did You Know?

Its knife-like mouthparts slice open skin rather than piercing it, which is why horse fly bites bleed so freely.