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Sticker of Common awl robber fly
Bug card No. 0986 of 4,939

Common awl robber fly

Neoitamus cyanurus

The common awl robber fly is a small grey and black hunter. It sits very still on a tree trunk and waits. When another insect flies past, it zooms out and grabs it with its long, bristly legs.

Lives in
Europe, the Near East and parts of Asia, at forest edges, hedges and wooded gardens
Length
1 to 1.7 cm (0.39 to 0.67 in)
Top speed
about 12 km/h (7.5 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless if you leave it alone. A robber fly might give a sharp nip if you catch it, so just watch it hunt.
What does it eat?
It catches flying insects such as small butterflies, lacewings, flies, gnats and beetles. Its larvae live in the soil and eat other insect larvae.
For real!Photo of Common awl robber fly
Picture by No machine-readable author provided. Jensbn~commonswiki assumed (based on copyright claims).. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Common awl robber fly about 1.7 cm long (0.67 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 3 grains of rice in a rowcould fly across a whole football pitch in 32 secondsmoves 200 times its own body length every second

How big is Common awl robber fly compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

It often catches insects that are bigger than itself.

2

It loves old woods, especially oak woods.

3

You can see it from May to October, but most of all in June and July.

4

Its larvae grow up underground, hunting other insect larvae in the soil.

5

It is very hard to tell apart from its close cousins, even for experts.

you asked

Most asked questions about Common awl robber fly

?What does a robber fly eat?

Other flying insects, which it grabs in the air with its legs.

?Is the common awl robber fly dangerous?

No. It is harmless to people if left alone, but it might nip if you catch it.

?How big is the common awl robber fly?

It is about 1 to 1.7 centimetres long.

For bug experts

Scientific name
Neoitamus cyanurus
Group
Flies and mosquitoes
Family
Asilidae
Classification
Insecta > Diptera > Asilidae
Lives on
Europe, Asia

Where the facts come from

  1. Neoitamus cyanurus (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 No machine-readable author provided. Jensbn~commonswiki assumed (based on copyright claims).. 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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More from the same group: Flies and mosquitoes

Also at home here: Forests and woods

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