Bug Wiki
Sticker of Ladybird fly
Bug card No. 2479 of 4,939

Ladybird fly

Gymnosoma rotundatum

The ladybird fly is a small fly with a round orange tummy with dark spots. That makes it look a bit like a ladybird. It loves warm, dry, sunny places and sits on flat, open flowers.

Lives in
Europe and Asia, from Britain to Japan and China, in warm, sunny places with flowers
Length
5 to 6 mm (0.2 to 0.24 in)
Top speed
about 6.9 km/h (4.3 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It is a small fly that does not bite or sting people.
What does it eat?
The grown-up flies visit open flowers. Its babies are much sneakier: they grow inside shield bugs.
For real!Photo of Ladybird fly
Picture by Fritz Geller-Grimm. CC BY-SA 2.5, via Wikimedia Commons.

How big is it?

How long is it?

Ladybird fly about 6 mm long (0.24 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
small enough to sit on your fingernailcould fly across a whole football pitch in 55 secondsmoves 320 times its own body length every second

How big is Ladybird fly compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

Its babies grow up inside shield bugs, the flat bugs shaped like a little shield.

2

Its wings are yellow-brown where they join the body.

3

In males the middle part of the body is golden, in females it is dark.

4

It lives in many countries, from Portugal and Britain all the way to Japan and Taiwan.

you asked

Most asked questions about Ladybird fly

?Why is it called a ladybird fly?

Because its round orange tummy with dark spots looks a bit like a ladybird.

?Is the ladybird fly dangerous?

No. It is harmless to people. Only shield bugs need to watch out for it.

For bug experts

Scientific name
Gymnosoma rotundatum
Group
Flies and mosquitoes
Family
Tachinidae
Classification
Insecta > Diptera > Tachinidae
Lives on
Europe, Asia

Where the facts come from

  1. Gymnosoma rotundatum (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 Fritz Geller-Grimm. CC BY-SA 2.5, 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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