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Sticker of Four-lined hornet fly
Bug card No. 1743 of 4,939

Four-lined hornet fly

Spilomyia sayi

The four-lined hornet fly is a hoverfly that dresses up like a wasp. It is black with four yellow bands on its long body. That costume tricks hungry birds, but it is really a gentle fly that loves flowers.

Lives in
Canada and the United States, around flowers
Length
1 to 1.6 cm (0.39 to 0.63 in)
Top speed
about 17 km/h (11 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It only looks like a wasp. It cannot sting.
What does it eat?
The grown-ups visit flowers for sweet nectar and pollen. The babies live in wet, rotting holes in trees.
For real!Photo of Four-lined hornet fly
Picture by raffib128. CC0, via Wikimedia Commons.

How big is it?

How long is it?

Four-lined hornet fly about 1.6 cm long (0.63 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)
as long as 2.5 grains of rice in a rowcould fly across a whole football pitch in 22 secondsmoves 300 times its own body length every second

How big is Four-lined hornet fly compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Hoverflies got their name because they can stay almost still in the air while flying.

2

Its babies grow up in the soft, rotting wood inside old trees.

3

Males fly up to high places, like hilltops, and wait there for females.

4

You can see the grown-ups from June to October in the north of where they live.

5

Its front and middle legs have thick, swollen thighs.

you asked

Most asked questions about Four-lined hornet fly

?Is the four-lined hornet fly a wasp?

No. It is a fly that only looks like a wasp, and it cannot sting.

?What does the four-lined hornet fly eat?

Grown-ups drink nectar and eat pollen from flowers.

?How big is the four-lined hornet fly?

It is about 10 to 16 millimetres long.

For bug experts

Scientific name
Spilomyia sayi
Named by
Goot, 1964
Group
Flies and mosquitoes
Family
Syrphidae
Classification
Insecta > Diptera > Syrphidae
Lives on
North America

Where the facts come from

  1. Spilomyia sayi (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by raffib128. CC0, Wikimedia Commons. The sticker of this bug is drawn from this picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

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