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Sticker of Bull thistle gall fly
Bug card No. 0717 of 4,939

Bull thistle gall fly

Urophora stylata
Eats: PlantsFlies and mosquitoesGardens and meadows6 legs

The bull thistle gall fly is a small fly that loves thistles. Its babies, called larvae, grow up inside thistle plants. People even use it as a helper to keep wild thistles from spreading too much.

Lives in
Europe and Asia as far as Japan, and brought to North America, India, Pakistan and Australia
Top speed
about 8 km/h (5 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting people.
What does it eat?
Its larvae feed inside thistle plants.
For real!Photo of Bull thistle gall fly
Picture by TristramBrelstaff. CC BY-SA 3.0, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

People brought it to North America on purpose, to slow down a thistle that was spreading everywhere.

2

It belongs to a family of flies that are often called fruit flies.

3

Its home stretches all the way from Europe to Japan.

you asked

Most asked questions about Bull thistle gall fly

?What does the bull thistle gall fly eat?

Its larvae grow up eating thistle plants from the inside.

?Is the bull thistle gall fly dangerous?

No. It is a small fly that only cares about thistles.

For bug experts

Scientific name
Urophora stylata
Group
Flies and mosquitoes
Family
Tephritidae
Classification
Insecta > Diptera > Tephritidae
Lives on
Europe, Asia, North America, Australia and Oceania

Where the facts come from

  1. Urophora stylata (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 TristramBrelstaff. CC BY-SA 3.0, 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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Also at home here: Gardens and meadows

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