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Sticker of Marsh greenbottle fly
Bug card No. 2775 of 4,939

Marsh greenbottle fly

Lucilia silvarum

The marsh greenbottle fly is a shiny, metal green fly. It looks very much like many other green flies, so it is hard to tell apart. It loves warm weather and can smell dead animals from far away.

Lives in
Europe, North Africa, Russia, China, the United States and Canada
Length
0.5 to 1 cm (0.18 to 0.39 in)
Top speed
about 8.9 km/h (5.5 mph)
Flying, estimate
Can it hurt you?
Dangerous: look, do not touch
It does not bite or sting, but its maggots can grow in sore, damaged skin of animals and, rarely, people. Look, do not touch, keep cuts clean and covered, and tell a grown-up if there are lots of these flies around.
What does it eat?
Its maggots eat dead animals and help clean them away. The grown-up flies sip nectar and other sweet juices.
For real!Photo of Marsh greenbottle fly
Picture by AfroBrazilian. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Marsh greenbottle fly about 1 cm long (0.39 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 fingernailas long as 1.5 grains of rice in a rowcould fly across a whole football pitch in 42 secondsmoves 250 times its own body length every second

How big is Marsh greenbottle fly compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Its eggs hatch in only about one day, which is very quick for a fly.

2

A maggot starts about 2 millimetres long and grows to about 17 millimetres.

3

It is also called the toad fly, because its maggots can live inside frogs and toads, which is very bad for them.

4

In North America it is often the first fly to arrive at a dead animal, so scientists can use its maggots like a clock to tell how long ago the animal died.

you asked

Most asked questions about Marsh greenbottle fly

?What does the marsh greenbottle fly eat?

Its maggots eat dead animals, and the grown-up flies sip nectar and sweet juices.

For bug experts

Scientific name
Lucilia silvarum
Named by
Meigen, 1826
Group
Flies and mosquitoes
Family
Calliphoridae
Classification
Insecta > Diptera > Calliphoridae
Lives on
Europe, Africa, Asia, North America
Also known as
Common toad fly

Where the facts come from

  1. Lucilia silvarum (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 AfroBrazilian. CC BY-SA 4.0, 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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